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Worksheets[Examination 3] Physics for Engineers
Total questions: 100
Worksheet time: 1hrs 14mins
Name
Class
Date
1.
A ball is thrown vertically upward with an initial velocity of 3 m/s from a window of a tall building. The ball strikes the ground level 4 seconds later. Determine the height of the window above the ground.
a)
A. 66.331 m
b)
B. 66.450 m
c)
C. 67.239 m
d)
D. 67.492 m
2.
A stone was dropped freely from a balloon at a height of 190 m above the ground. The balloon is moving upward at a speed of 30 m/s. Determine the velocity of the stone as it hits the ground.
a)
A. 69.03 m/s
b)
B. 68.03 m/s
c)
C. 67.30 m/s
d)
D. 69.23 m/s
3.
A ball is thrown vertically at a speed of 20 m/s from a building 100 m above the ground. Find the velocity and position of the stone above the ground after 5 seconds.
a)
A. 4.67 m, 48.30 m/s
b)
B. 4.54 m, 47.68 m/s
c)
C. 5.43 m, 47.69 m/s
d)
D. 5.68 m, 48.20 m/s
4.
A ball is thrown vertically at a speed of 30 m/s from the top of a tower 200 m high. Determine the velocity of the stone and the time that it strikes the ground.
a)
A. 11.50 sec, 65.80 m/s
b)
B. 11.45 sec, 66.59 m/s
c)
C. 10.30 sec, 67.21 m/s
d)
D. 10.14 sec, 69.45 m/s
5.
A ball is thrown vertically with a velocity of 20 m/s from the top of a building 100 m high. Find the velocity of the stone at a height of 40 m above the ground.
a)
A. 39.71 m/s
b)
B. 40.23 m/s
c)
C. 39.88 m/s
d)
D. 39.68 m/s
6.
A projectile is fired from the top of a cliff 92 m high with a velocity of 430 m/s directed 45° to the horizontal. Find the range on the horizontal plane through the base of the cliff.
a)
A. 18.959 km
b)
B. 23.408 km
c)
C. 15.273 km
d)
D. 20.365 km
7.
A stone is thrown outward at an angle of 30° with the horizontal into a river from a cliff 120 meters above the water level at a velocity of 36 km/h. At what height above the water level will the stone start to fall?
a)
A. 121.27 m
b)
B. 189.29 m
c)
C. 111.38 m
d)
D. 152.22 m
8.
A stone was thrown upward at an angle of 60° with the horizontal and a resultant vertical speed of 100.0 m/s. If gravity decelerates the speed at 9.8 m/s², what is the actual speed of the stone 10.0 seconds later?
a)
A. 57.77 m/s
b)
B. 64.22 m/s
c)
C. 60.35 m/s
d)
D. 67.23 m/s
9.
A projectile is launched at 45° to the horizontal on level ground at a speed of 60 m/s. Neglecting air resistance, what is the range of the projectile?
a)
A. 366.86 m
b)
B. 355.29 m
c)
C. 663.24 m
d)
D. 386.66 m
10.
A ball thrown at an angle of 30° with the horizontal from a point 60 m from the edge of a vertical cliff 48 m high just misses the edge. Determine the initial velocity of the ball and the distance beyond the cliff where it strikes the ground.
a)
A. 28.4 m/s; 32.6 m
b)
B. 26.1 m/s; 46.9 m
c)
C. 27.5 m/s; 56.5 m
d)
D. 31.1 m/s; 43.2 m
11.
A block passes a point 4 m from the edge of a table with a velocity of 5 m/s. It slides off the edge (5 m high) and strikes the floor 3 m from the edge. What was the coefficient of friction between the block and the table?
a)
A. 0.65
b)
B. 1.04
c)
C. 0.21
d)
D. 0.11
12.
A ball is shot at ground level at 60° with the horizontal at 10 m/s. What is the maximum height attained?
a)
A. 2.47 m
b)
B. 3.29 m
c)
C. 4.61 m
d)
D. 3.82 m
13.
A stone is thrown upward at 30° with the horizontal and lands 60 m horizontally and 2 m vertically below its release point. Determine the initial velocity.
a)
A. 27.35 m/s
b)
B. 28.35 m/s
c)
C. 25.35 m/s
d)
D. 26.35 m/s
14.
A projectile is fired with a muzzle velocity of 300 m/s at 20° from the top of a building 30 m high. With what velocity will it hit the ground?
a)
A. 300.98 m/s
b)
B. 310.96 m/s
c)
C. 320.96 m/s
d)
D. 330.96 m/s
15.
A projectile leaves at 50 m/s at 30° with the horizontal. Find the maximum height reached.
a)
A. 31.86 m
b)
B. 41.26 m
c)
C. 28.46 m
d)
D. 51.26 m
16.
A ball is shot at a ground level at an angle of 60 degrees with the horizontal with an initial velocity of 100 m/s. Determine the height of the ball after 2 sec.
a)
a) 162.46 m.
b)
b) 153.59 m.
c)
c) 175.48 m.
d)
d) 186.42 m.
17.
A ball is shot at an average speed of 200 m/s at an angle of 20° with the horizontal. What would be the velocity of the ball after 8 sec.?
a)
a) 188.21 m/s
b)
b) 154.34 m/s
c)
c) 215.53 m/s
d)
d) 198.37 m/s
18.
A projectile has a velocity of 200 m/s acting at an angle of 20° with the horizontal. How long will it take for the projectile to hit the ground surface?
a)
a) 13.95 sec.
b)
b) 15.75 sec.
c)
c) 10.11 sec.
d)
d) 24.23 sec.
19.
A stone is thrown upward at an angle of 20° with the horizontal from the top of a tower 30 m. high and hits the ground at a distance of 5976.4 m. horizontally from the base of the tower. Find the time of flight of the stone until it hits the ground.
a)
a) 21.20 sec.
b)
b) 22.20 sec.
c)
c) 19.39 sec.
d)
d) 24.15 sec.
20.
A projectile leaves a velocity of 50 m/s at an angle of 30° with the horizontal. Find the time it would take for the projectile to reach the maximum height.
a)
a) 2.55 sec.
b)
b) 2.60 sec.
c)
c) 3.10 sec.
d)
d) 2.89 sec.
21.
A baseball is thrown from a horizontal plane following a parabolic path with an initial velocity of 100 m/s at an angle of 30° above the horizontal. How far from the throwing point will the ball attain its original level?
a)
a) 890 m.
b)
b) 884 m.
c)
c) 883 m.
d)
d) 875 m.
22.
A shot is fired at an angle of 45° with the horizontal and a velocity of 300 fps. Calculate, to the nearest, the range of the projectile.
a)
a) 3500 ft.
b)
b) 1200 ft.
c)
c) 4000 ft.
d)
d) 934 yds.
23.
Three crates with masses A = 45.2 kg, B = 22.8 kg, and C = 34.3 kg are placed with B along a horizontal frictionless surface. Find the force exerted by B and C by pushing the crates to the right with an acceleration of 1.32 m/sec².
a)
a) 45.3 kN
b)
b) 54.2 kN
c)
c) 43.2 kN
d)
d) 38.7 kN
24.
Three blocks A, B, and C are placed on a horizontal frictionless surface and connected by chords. Determine the tension between block B and C when a horizontal tensile force of 6.5 N is applied at C. Masses: A = 1.2 kg, B = 2.4 kg, C = 3.1 kg.
a)
a) 3.50 N
b)
b) 4.21 N
c)
c) 3.89 N
d)
d) 4.65 N
25.
A constant force P = 750 N acts on a body during the first 6 m of its motion starting from rest. If the coefficient of kinetic friction μ = 0.20, find the velocity of the body after moving 9 m.
a)
a) 3.93 m/s
b)
b) 4.73 m/s
c)
c) 2.32 m/s
d)
d) 3.11 m/s
26.
A weight of 9 kN is suspended on a 150 m cable weighing 0.002 kN/m. If the weight is raised 100 m, how much work is done?
a)
a) 915,000 J
b)
b) 938,700 J
c)
c) 951,000 J
d)
d) 905,100 J
27.
Find the kinetic energy of a 4000 lb automobile moving at 44 ft/s.
a)
a) 1.21 × 10⁵ ft-lb
b)
b) 2.1 × 10⁵ ft-lb
c)
c) 1.8 × 10⁵ ft-lb
d)
d) 1.12 × 10⁵ ft-lb
28.
A box slides from rest down a 30° incline, then 2 m on a horizontal floor where the coefficient of friction μ = 0.40. Find the initial height of the box.
a)
a) 7.24 m
b)
b) 5.21 m
c)
c) 4.75 m
d)
d) 9.52 m
29.
A 400 N block slides with a 200 N horizontal force, reaching a velocity of 20 m/s in 30 m. Find the coefficient of friction μ.
a)
a) 0.18
b)
b) 0.24
c)
c) 0.31
d)
d) 0.40
30.
A 10 kN car is towed at 80 kph and suddenly the cable is cut at the foot of a 30 m incline. Find the elevation the car will reach before stopping.
a)
a) 55.16 m
b)
b) 60.24 m
c)
c) 51.43 m
d)
d) 49.62 m
31.
A wooden block slides 6 m down a 45° incline, then 3 m on a horizontal floor, then up a 30° incline with a coefficient of friction μ = 0.15. Find the total distance traveled.
a)
a) 20 m
b)
b) 11 m
c)
c) 14 m
d)
d) 18 m
32.
A 1000 N block (A) and 250 N block (B) are connected over a pulley. Find the velocity of block B when it hits the ground.
a)
a) 1.44 m
b)
b) 2.55 m
c)
c) 5.22 m
d)
d) 3.25 m
33.
A 500 N block is on a 30° incline and moved 3 m by a 600 N force. Find the velocity of the block when it returns.
a)
a) 8.6 m/s
b)
b) 5.6 m/s
c)
c) 6.4 m/s
d)
d) 7.1 m/s
34.
A 10 kg block is raised 3 m. Find the change in potential energy.
a)
a) 350 kg·m²/s
b)
b) 320 J
c)
c) 350 N·m
d)
d) 294 J
35.
A 40-ton car is on a 2% grade at 30 mph. Find the velocity at the foot of the grade if allowed to run back.
a)
a) 37 fps
b)
b) 31 fps
c)
c) 43 fps
d)
d) 34 fps
36.
Find the work done in accelerating a 200-ton train to 30 mph.
a)
a) 12,024,845 ft-lb
b)
b) 13,827,217 ft-lb
c)
c) 11,038,738 ft-lb
d)
d) 10,287,846 ft-lb
37.
A 40 kN drop hammer drives a pile 150 mm into the ground with an impact velocity of 6 m/s. Find the soil resistance.
a)
a) 542.4 kN
b)
b) 489.3 kN
c)
c) 384.6 kN
d)
d) 248.7 kN
38.
Find the work done by a 200 lbf force acting at 28° over a distance of 2 ft.
a)
a) 320 J
b)
b) 480 J
c)
c) 540 J
d)
d) 215 J
39.
A 50 kg object strikes the unscratched spring attached to a vertical wall having a spring constant of 20 kN/m. Find the maximum deflection of the spring. The velocity of the object before it strikes the spring is 40 m/s.
a)
a) 1 m
b)
b) 2 m
c)
c) 3 m
d)
d) 4 m
40.
To push a 25 kg crate up a 27° incline plane, a worker exerts a force of 120 N, parallel to the incline. As the crate slides 3.6 m, how much is the work done on the crate by the worker and by the force of gravity?
a)
a) 400 J
b)
b) 420 J
c)
c) 380 J
d)
d) 350 J
41.
A train weighing 12,000 kN is accelerated at a constant rate up a 2% grade with a velocity increasing from 30 kph to 50 kph in a distance of 500 meters. Determine the horsepower developed by the train.
a)
a) 5,394 kW
b)
b) 5,120 kW
c)
c) 4,486 kW
d)
d) 4,591 kW
42.
An elevator has an empty weight of 5,100 N. It is designed to carry a maximum load of 20 passengers from the ground floor to the 25th floor of the building in a time of 18 seconds. Assuming the average weight of a passenger to be 710 N and the distance between floors to be 35 m, what is the minimum constant power needed for the elevator motor?
a)
a) 94.3 kW
b)
b) 85.5 kW
c)
c) 97.4 kW
d)
d) 77.6 kW
43.
A piano string is 80 cm long and weighs 5 N. If the string is stretched by a force of 500 N, what is the speed of the wave set up when the hammer strikes the string?
a)
a) 26 m/s
b)
b) 27 m/s
c)
c) 28 m/s
d)
d) 30 m/s
44.
A 16-18 wire cable 100 ft. long is stretched between two poles under tension of 500 lb. If the cable is struck at one end, how long will it take for the wave to travel to the far end and return?
a)
a) 0.63 s
b)
b) 0.64 s
c)
c) 0.65 s
d)
d) 0.66 s
45.
Assume that Young's modulus for silver is 77.5 GPa. If it has a density of 10.5 × 10³ kg/m³, how fast does sound travel through the silver?
a)
a) 2600 m/s
b)
b) 2700 m/s
c)
c) 1600 m/s
d)
d) 1700 m/s
46.
The speed of a compressional wave in silver (specific gravity 10.5) is 2610 m/s. Compute Young's modulus (Y) for silver.
a)
a) 71.6 GN/m²
b)
b) 76 GN/m²
c)
c) 716 GN/m²
d)
d) 716 GN/m²
47.
Copper has a density of 9 g/cm³ and a bulk modulus of 120 GN/m². What is the speed of a wave through it?
a)
a) 3600 m/s
b)
b) 6300 m/s
c)
c) 6030 m/s
d)
d) 1460 m/s
48.
The time rate of change of velocity. Since velocity is a directed or vector quantity involving both magnitude and direction, a velocity may change by a change of magnitude (speed) or by a change of direction or both.
a)
a) gravitation
b)
b) invariant mass
c)
c) acceleration
d)
d) none of these
49.
The closeness of an indication or reading of a measurement device to the actual value of the quantity being measured. Usually express as ± percent of full scale output or reading.
a)
a) accuracy
b)
b) compression
c)
c) chemical equilibrium
d)
d) distance
50.
The rate of change of angular velocity with respect to time.
a)
a) angular velocity
b)
b) acceleration
c)
c) angular acceleration
d)
d) none of these
51.
What is a physical quantity expressing the size of a part of a surface?
a)
a) lever
b)
b) areaytttd
c)
c) measurement
d)
d) bend
52.
The rate of a change of angular displacement with respect to time.
a)
a) angular velocity
b)
b) load
c)
c) instantaneous
d)
d) brittle
53.
A rigid, usually horizontal, structural element.
a)
a) beam bridge
b)
b) force
c)
c) core
d)
d) beam
54.
A simple type of bridge, composed of horizontal beams supported by vertical posts.
a)
a) beam
b)
b) brace
c)
c) beam bridge
d)
d) buckle
55.
To curve; bending occurs when a straight material becomes curved; one side squeezes together in compression, and the other side stretches apart intention.
a)
a) tension
b)
b) brace
c)
c) buckle
d)
d) none of these
56.
Is mechanics applied to biology (Fung). This includes research and analysis of the mechanics of living organisms and application of engineering principles to and from biological systems.
a)
a) biomechanics
b)
b) engineering mechanics
c)
c) mechanics
d)
d) none of these
57.
A structural support;
a)
a) brittle
b)
b) cable
c)
c) brace
d)
d) cantilever
58.
Characteristic of a material that fails without warning; brittle materials do not stretch or shortened before failing.
a)
a) beam
b)
b) brace
c)
c) beam bridge
d)
d) brittle
59.
To bend under compression.
a)
a) brittle
b)
b) compression
c)
c) bend
d)
d) buckle
60.
A structural element formed from steel wire bound in strands; the suspending element in a bridge; the supporting element in some dome roofs.
a)
a) beam
b)
b) cable
c)
c) brace
d)
d) compression
61.
A projecting structure supported only at one end, like a shelf bracket or a dividing board.
a)
a) cantilever
b)
b) equilibrium
c)
c) cable
d)
d) irreversible
62.
A condition in which a chemical reaction is occurring at equal rates in its forward and reverse directions, so that the concentrations of the reacting substances do not change with time.
a)
a) chemical equilibrium
b)
b) equilibrium
c)
c) force
d)
d) pile
63.
A pressing force that squeezes a material together.
a)
a) force
b)
b) compression
c)
c) steel
d)
d) modulus
64.
Central region of a skyscraper; usually houses elevator and stairwell.
a)
a) core
b)
b) physical constant
c)
c) gravitational attraction
d)
d) dimension
65.
To change shape.
a)
a) dimension
b)
b) deform
c)
c) deformation
d)
d) instantaneous
66.
Is a numerical description of how far apart objects are at any given moment in time. In physics or everyday discussion, distance may refer to a physical length, a period of time, or estimation based on other criteria. In mathematics, distance must meet more rigorous criteria.
a)
a) force
b)
b) distance
c)
c) mass
d)
d) deformation
67.
Is the mathematical description of an object or substances tendency to be deformed elastically ( i.e. non-permanently) when a force is applied to it.
a)
a) modulus of elasticity
b)
b) fluid power
c)
c) hydraulics
d)
d) gravitation
68.
A profession in which acknowledge of math and natural science is applied to develop ways to utilize the materials and forces of nature for the benefit of all human beings.
a)
a) mechanics
b)
b) engineering mechanics
c)
c) engineering
d)
d) none of these
69.
A condition in which all acting influences our cancelled by others, resulting in a stable, balanced, or unchanging system.
a)
a) chemical equilibrium
b)
b) equilibrium
c)
c) invariant mass
d)
d) gravitation
70.
The capacity to do work or cause physical change, energy, strength, or active power: the force of an explosion
a)
a) inertia
b)
b) quantity
c)
c) lever
d)
d) force
71.
Is a natural phenomenon by which all object with mass attract each other? In everyday life, gravitation is most commonly thought of as the agency that gives objects weight.
a)
a) gravitational attraction
b)
b) universal gravitation
c)
c) gravitation
d)
d) mass
72.
Is a physical constant involved in the calculation of the gravitational attraction between objects with mass? It appears in Newton's law of universal gravitation and its Einstein's theory of general relativity.
a)
a) gravitational attraction
b)
b) universal gravitation
c)
c) gravitation
d)
d) gravitational constant
73.
Is the measurement of vertical distance, but has two meanings in common use. It can either indicate how "tall" something is, or how "high up" it is.
a)
a) magnitude
b)
b) height
c)
c) distance
d)
d) none of these
74.
Is a topic of science and engineering dealing with the mechanical properties of liquids. Hydraulics is part of the more general discipline of fluid power.
a)
a) hydraulics
b)
b) physical body
c)
c) fluid power
d)
d) momentum
75.
The tendency of a body to resist acceleration; the tendency of a body at rest to remain at rest or of a body in straight line motion to stay in motion in a straight line unless acted on by an outside force.
a)
a) inertia
b)
b) energy
c)
c) force
d)
d) none of these
76.
Occurring or completed without perceptible delay.
a)
a) volume
b)
b) shear
c)
c) instantaneous
d)
d) none of these
77.
Is the same for all frames of reference? A mass for a particle is m in the equation.
a)
a) mass
b)
b) invariant mass
c)
c) force
d)
d) all of these
78.
That cannot be revoked or undone.
a)
a) measurement
b)
b) irreversible
c)
c) base unit
d)
d) none of these
79.
A device connecting two or more adjacent parts of a structure; a roller joined allows adjacent parts to move controllably pass one another; a rigid joint prevents adjacent parts from moving or rotating past one another.
a)
a) energy
b)
b) velocity
c)
c) force-field
d)
d) joint
80.
Is the base unit of mass in the international system of units (known also by its french language initials "SI").
a)
a) mass
b)
b) measurement
c)
c) weight
d)
d) kilogram
81.
Is the long dimension of any object? The length of a thing is the distance between its end, it's linear extend is measured from end to end.
a)
a) distance
b)
b) rigid
c)
c) free body
d)
d) length
82.
A simple machine consisting of a rigid bar pivoted on a fixed point and used to transmit force, as in raising or moving a weight at one end by pushing down on the other.
a)
a) inertia
b)
b) quantity
c)
c) lever
d)
d) force
83.
Weight distribution throughout the structure; loads caused by wind, earthquakes, and gravity, for example, affect how weight is distributed throughout the structure.
a)
a) angular velocity
b)
b) load
c)
c) instantaneous
d)
d) brittle
84.
A property by which it can be large or smaller than other objects of the same kind; in technical terms, in ordering of the glass of objects.
a)
a) magnitude
b)
b) height
c)
c) distance
d)
d) none of these
85.
Is a fundamental concepts in physics, roughly corresponding to the intuitive idea of "how much matter there is in an object". Mass is a central concept of classical mechanics and related subjects, and there are several definitions of mass within the framework of relativistic kinematics.
a)
a) mass
b)
b) measurement
c)
c) weight
d)
d) kilogram
86.
Is commonly defined is the substance of which physical objects are composed, not counting the contribution of various energy or force-fields, which are not usually considered to be matter per se.
a)
a) mass
b)
b) magnitude
c)
c) matter
d)
d) none of these
87.
Science is the action of forces on material bodies. It forms a central part of all physical science and engineering.
a)
a) engineering mechanics
b)
b) mechanics
c)
c) mechanism
d)
d) none of these
88.
Is the estimation of magnitude of some attribute of an object, such as its length or weight, relative to a unit of measurement?
a)
a) mass
b)
b) measurement
c)
c) weight
d)
d) kilogram
89.
Is the product of the mass and velocity of an object? Motion - The act or process of changing position or place.
a)
a) hydraulics
b)
b) physical body
c)
c) fluid power
d)
d) momentum
90.
The three laws proposed by sir isaac newton to define the concept of a force and describe motion, used as the basis of classical mechanics.
a)
a) law of inertia
b)
b) newton's law of motion
c)
c) newton's law
d)
d) none of these
91.
A long, round pole of wood, concrete, or steel driven into the soil by pile drivers.
a)
a) chemical equilibrium
b)
b) equilibrium
c)
c) force
d)
d) pile
92.
Is a collection of masses, taken to be one. For example, a cricket ball can be considered an object but the ball also consists of many particles.
a)
a) hydraulics
b)
b) physical body
c)
c) fluid power
d)
d) momentum
93.
Is a kind of property which exists as magnitude or multitude.
a)
a) magnitude
b)
b) fluid power
c)
c) quantity
d)
d) none of these
94.
Ability to resist the formation when subjected to a load; the measure of a structures ability not to change shape when subjected to a load.
a)
a) distance
b)
b) rigid
c)
c) free body
d)
d) length
95.
Is the effort to understand or to understand better how nature works with observable physical evidence is the basis of that understanding.
a)
a) physics
b)
b) science
c)
c) physical evidence
d)
d) load
96.
A force that causes parts of a material to slide past one another in opposite directions.
a)
a) force
b)
b) stress
c)
c) shear
d)
d) momentum
97.
Is a stress state where the stress is parallel or tangential to a face of the material, as opposed to normal stress when the stress is perpendicular to the face.
a)
a) shear stress
b)
b) tensile stress
c)
c) shear
d)
d) none of these
98.
A car accelerates uniformly from rest to a speed of 25 m/s over a distance of 100 m. What is the acceleration of the car?
a)
b) 0.75 m/s²
b)
c) 2.00 m/s²
c)
d) 1.50 m/s²
d)
a) 1.25 m/s²
99.
A ball is thrown horizontally from a height of 20 m. How long will it take to hit the ground? (Assume g = 9.8 m/s²)
a)
c) 1.50 s
b)
b) 1.78 s
c)
a) 2.02 s
d)
d) 2.50 s
100.
A 5 kg object is attached to a spring with a spring constant of 200 N/m. If the object is displaced 0.1 m from its equilibrium position, what is the force exerted by the spring?
a)
d) 25 N
b)
b) 15 N
c)
c) 10 N
d)
a) 20 N
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