WorksheetsMECH 223 – Diagnostic Test 02: Elements
Total questions: 105
Worksheet time: 53mins
Name
Class
Date
1.
A point on the object from which it can be suspended in any orientation without tending to rotate.
a)
Center of gravity
b)
Barycenter
c)
Centroid
d)
All of the above
2.
A flower pot falls off a ledge of a 5th floor window, just as it passes the third floor window, someone accidentally drops a glass of water from the window. Which of the following is true
a)
The flower pot hits the ground at the same time as the glass.
b)
The glass hits the ground before the flower pot.
c)
The flower pot hits the ground first and with a higher speed that the glass
d)
The flower pot and the glass hit the ground at the same speed.
3.
What refers to quantity of matter in terms of its ability to resist motion when acted on by a force?
a)
Mass
b)
Inertia
c)
Weight
d)
Permeability
4.
A measure of the resistance of a body its offers to any change in its angular velocity determined by its mass and distribution of its mass about the axis of rotation is known as:
a)
moment of inertia
b)
friction
c)
torsion
d)
angular acceleration
5.
Any influence capable of producing change in the motion of an object is called:
a)
Force
b)
Velocity
c)
Acceleration
d)
Vector
6.
The tendency of any object to remain at rest or to continue in motion is called:
a)
Equilibrium
b)
Mass
c)
Inertia
d)
Static
7.
The distance per unit time.
a)
Speed
b)
Velocity
c)
Acceleration
d)
Motion
8.
The displacement per unit time.
a)
Speed
b)
Velocity
c)
Acceleration
d)
Motion
9.
Defined as the gravitational force exerted on an object because of its attraction to some other masses such as the earth.
a)
Weight
b)
Mass
c)
Inertia
d)
Either mass or weight
10.
Defined quantitatively as the amount of matter of which the object is made. It also refers to as the measure of the object’s inertia.
a)
Weight
b)
Mass
c)
Relative density
d)
Specific weight
11.
Which of the following statements is TRUE?
a)
The weight and mass of a body depends on its location.
b)
The mass of the body is dependent on its location.
c)
The weight of a body is independent on its location.
d)
The weight of a body depends on its location while the mass is independent of its location.
12.
Which of the following is true about the weight of an object?
a)
It is the force with which it is attracted to the earth.
b)
It is the same as the mass of the object.
c)
It is equivalent to the mass of the object divided by the gravitational acceleration.
d)
It is constant anywhere in the universe.
13.
A measure inertia of a body, which it is resistance to a change in velocity.
a)
Force
b)
Mass
c)
Acceleration
d)
Moment of inertia
14.
A quantitative measure of inertia.
a)
Weight
b)
Mass
c)
Force
d)
Acceleration
15.
Indicate the FALSE statement.
a)
Weight of body is a gravitational force.
b)
Mass is the measure of the response of the body to an applied force.
c)
Weight of body varies with its location.
d)
Weight of the body is always equal to its mass.
16.
A cart loaded with gravel is hard to get started rolling because of its large:
a)
Mass
b)
Weight
c)
Density
d)
Volume
17.
Weight density is equal to the mass density multiplied by:
a)
Acceleration in m/s²
b)
Velocity in m/s
c)
Specific gravity
d)
Density of water at 4°C
18.
A free falling body is a body in rectilinear motion and with constant _____.
a)
acceleration
b)
speed
c)
deceleration
d)
velocity
19.
Which of the following is the formula for the mass moment of inertia of a hollow cylinder with R and r as outer radius and inner radius, respectively?
a)
I = ½ m (r² - r²)
b)
I = ½ m (r² + r²)
c)
I = ½ m (r + r²)
d)
I = ½ m (r - r²)
20.
What is the mass moment of inertia of a aright circular cone of base radius r?
a)
I = 1/5 mr²
b)
I = 1/2 mr²
c)
I = 3/10 mr²
d)
I = 2/7 mr²
21.
When the total kinetic energy of system is the same as before and after collision of two bodies, it is called:
a)
plastic collision
b)
inelastic collision
c)
elastic collision
d)
static collision
22.
The energy stored in a stretched elastic material such as spring is:
a)
mechanical energy
b)
elastic potential energy
c)
internal energy
d)
kinetic energy
23.
An energy by virtue of the object’s position of elevation is called:
a)
rest energy
b)
potential energy
c)
thermal energy
d)
kinetic energy
24.
An energy by virtue of the object’s mass is called:
a)
rest energy
b)
potential energy
c)
thermal energy
d)
kinetic energy
25.
The energy of an object due to its vertical separation from earth’s surface.
a)
Thermal energy
b)
Rest energy
c)
Gravitational potential energy
d)
Elastic potential energy
26.
The energy stored in a stretched or compressed elastic material such as a spring is called:
a)
thermal energy
b)
elastic potential energy
c)
kinetic energy
d)
elastic kinetic energy
27.
The kinetic energy of the atoms and molecules due to their random motion is called:
a)
thermal energy
b)
elastic potential energy
c)
rest energy
d)
heat energy
28.
Indicate the FALSE statement about work.
a)
Work = force x distance
b)
Work is a scalar quantity
c)
The unit of work in the SI system is joules and erg in the English system.
d)
Work = power x time
29.
The force due to gravity does no work on objects that:
a)
fall to the ground
b)
is moved vertically upward
c)
is moved parallel to the surface of the earth
d)
all of the above
30.
The rate of doing work.
a)
Force
b)
Energy
c)
Power
d)
Momentum
31.
What is it that the power delivered by any machine is always less than the power supplied to it?
a)
Dues to its efficiency
b)
Due to its speed
c)
Due to the presence of the potential energy
d)
Due to the presence of friction
32.
The capacity to do work is called:
a)
Power
b)
Energy
c)
Momentum
d)
Impulse
33.
Kinetic energy equals
a)
½ mass x velocity
b)
Mass x velocity
c)
Mass x acceleration
d)
½ mass x velocity²
34.
An energy by virtue of the object’s motion is called:
a)
rest energy
b)
potential energy
c)
thermal energy
d)
kinetic energy
35.
The change in gravitational potential energy depends on the _____ of an object.
a)
initial and final vertical position
b)
initial and final velocity
c)
path followed in moving between two positions
d)
all of the above
36.
Kinetic means that it is:
a)
in motion
b)
subjected to a force
c)
is in equilibrium
d)
is subjected to friction
37.
What will happen to the kinetic energy of the body if its velocity doubled?
a)
Doubled
b)
Quadrupled
c)
Tripled
d)
Remains the same
38.
Thermal energy refers to the random kinetic energy of all _____ in a substance.
a)
atoms
b)
molecules
c)
masses
d)
atoms and molecules
39.
The work done by a force of 1 newton acting through a distance of 1 m is known as:
a)
Watt
b)
Erg
c)
Joule
d)
BTU
40.
The work done in lifting an object of. Mass “m” to a height “h” is:
a)
mh
b)
mgh
c)
mh/g
d)
mgh/2
41.
The product of force and displacement is called:
a)
Energy
b)
Power
c)
Work
d)
Momentum
42.
Which of the following is NOT a unit of work?
a)
Joules
b)
Kilowatt-hour
c)
Erg
d)
Slug
43.
The work done by the external force on a particle is equal to the _____ of the particle.
a)
change in momentum
b)
impulse
c)
change in kinetic energy
d)
change in potential energy
44.
The work done by all forces except the gravitational force is always equal to the _____ of the system.
a)
total potential energy
b)
total impulse
c)
total mechanical energy
d)
total momentum
45.
There is no work done when:
a)
the force is parallel to the displacement
b)
the force is perpendicular to the displacement
c)
there is an angle between the force and the displacement
d)
all of the above
46.
What refers to a specific force applied over specific distance?
a)
Impulse
b)
Power
c)
Work
d)
Energy
47.
What is the rate at which work is done?
a)
Energy
b)
Power
c)
Momentum
d)
Impulse
48.
Which one is the fundamental physical principle of energy?
a)
Energy cannot be conserved.
b)
Energy is proportional to momentum.
c)
Kinetic energy - potential energy = 0
d)
Total amount of energy of the universe is constant.
49.
Which one is the law of conservation of mechanical energy?
a)
Kinetic energy + potential energy = constant
b)
All forms of energy (hear light and sound) are the same as kinetic energy.
c)
Total amount of energy of the universe is constant.
d)
Kinetic energy times potential energy is constant.
50.
What refers to a mechanical system for which the sum of the kinetic energy and potential energy is constant?
a)
Rigid system
b)
Constant system
c)
Advantage system
d)
Conservative system
51.
Which of the following is true about power?
a)
It is the rate of doing work.
b)
It is measured in watts.
c)
It is a scalar quantity.
d)
All of the above
52.
What energy is in an elastic string when it is stretched or compressed?
a)
Elastic potential energy
b)
Mechanical energy
c)
Elastic kinetic energy
d)
Rest energy
53.
What refers to the energy per unit mass?
a)
Specific energy
b)
Rest energy
c)
Internal energy
d)
Pure energy
54.
If m and U are mass of a body and specific energy, respectively, then which of the equations below is the total energy?
a)
E = m/U
b)
E = m
c)
E = mU
d)
E = 1/2 mU
55.
The value 778 ft lbf/BTU is used to convert between English mechanical and thermal energy units. What is the value commonly called?
a)
Energy constant
b)
Joule’s constant
c)
BTU constant
d)
Helmholtz constant
56.
Momentum is a property related to the object’s _____.
a)
motion and mass
b)
mass and acceleration
c)
motion and weight
d)
weight and velocity
57.
Momentum is the product of mass and:
a)
acceleration
b)
velocity
c)
force
d)
time
58.
Linear momentum is a product of mass and velocity and this can be expressed also as a function of:
a)
Force, acceleration, time
b)
Force, velocity, time
c)
Force, time
d)
Force, displacement
59.
Law of conservation of momentum states that the total momentum of a system remains constant _____.
a)
provided there is no change in mechanical energy
b)
provided that kinetic energy is converted into heat, light and sound energy
c)
provided its momentum is negative
d)
provided no external force acts on the system
60.
Inelastic collision is a collision in which the total kinetic energy after the collision is _____ before collision.
a)
equal to zero
b)
equal
c)
less than
d)
greater than
61.
A vector quantity which is a product of mass and velocity of the body.
a)
Momentum
b)
Impulse
c)
Energy
d)
Displacement
62.
The product of a force and the time during which it acts is known as:
a)
momentum
b)
impulse
c)
coefficient of restitution
d)
impact
63.
Change of momentum is equal to:
a)
displacement
b)
impulse
c)
power
d)
kinetic energy
64.
If the velocity of a body doubled in value, its _____ will also double.
a)
acceleration
b)
impulse
c)
momentum
d)
kinetic energy
65.
The negative ration of the relative velocity after a collision to a relative velocity before a collision.
a)
Coefficient of friction
b)
Coefficient of sliding
c)
Coefficient of kinetic friction
d)
Coefficient of restitution
66.
A collision in which the total kinetic energy after collision is less than that before collision.
a)
Elastic collision
b)
Inelastic collision
c)
Straight line collision
d)
Off center collision
67.
When the colliding bodies stick together on impact which results in the maximum possible loss in kinetic energy, it is said to be _____collision.
a)
elastic
b)
inelastic
c)
completely inelastic
d)
none of the above
68.
Which of the following is true about collision?
a)
In elastic collision, no kinetic energy is lost.
b)
In elastic collision, the two colliding bodies stick together after impact.
c)
In completely inelastic collision, no kinetic energy is lost.
d)
Kinetic energy is not conserved in an elastic collision.
69.
At what situation when the colliding object stops and the target moves off with the same speed after collision?
a)
When their masses are equal and the target is stationary.
b)
When the target is stationary even their masses are not equal.
c)
When their masses are equal and the target is moving with a speed less than that of the colliding body.
d)
When their masses are equal and the target is moving with a speed greater than that of the colliding body.
70.
If the colliding object has a mass less than that of the stationary target, after impact, _____.
a)
colliding object stops
b)
the colliding object continues its motion in the same direction with reduce speed
c)
the colliding object continues its motion in the same direction with the same speed
d)
the lighter object bounces off the heavier one
71.
If the colliding object has a mass greater than that of the stationary target, after impact, _____.
a)
colliding object stops
b)
the colliding object continues its motion in the same direction with reduced speed
c)
the colliding object continues its motion in the same direction with the same speed
d)
the lighter object bounces off the heavier one
72.
For perfect elastic collision, the coefficient of restitution, e, is equal to:
a)
0
b)
1
c)
negative value
d)
infinity
73.
For perfectly inelastic collision, the coefficient of restitution, e, is equal to:
a)
0
b)
1
c)
negative value
d)
infinity
74.
In an elastic collision.
a)
The kinetic energy is conserved.
b)
The kinetic energy is not conserved.
c)
The objects sticks together after impact.
d)
The loss of kinetic energy is maximum.
75.
What will occur when two objects strike each other because they are in relative motion and their paths cross at exactly the right time?
a)
Momentum
b)
Impulse
c)
Collision
d)
Conservative of momentum
76.
According to the law of conservation of momentum, the total momentum contained in two objects is _____ after collision as before.
a)
the same
b)
less than
c)
greater than
d)
either less than or greater than
77.
The momentum of a moving object can change in all of the following ways except:
a)
a change in the mass of the object.
b)
a change in the speed of the object
c)
change in the direction of the object’s mass
d)
change in the shape of the object
78.
What refers to the quantitative expression of the average kinetic energy contained in matter?
a)
Heat
b)
Viscousity
c)
Temperature
d)
Pressure
79.
Why is the Celsius temperature scale sometimes known as the centigrade temperature scale?
a)
Because one degree of temperature in this scale is equal to 1/100 of the difference between the melting temperature of pure water at sea level and the boiling temperature of pure water at sea level.
b)
Because one degree of temperature in this scale is subdivided into 100 units.
c)
Because it is named after Celsius, whose nickname is “Centigrado”
d)
Because the boiling point is 100 times that of the freezing point.
80.
Can an object at absolute zero temperature transfer energy to anything else?
a)
Never
b)
Yes
c)
Sometimes
d)
Often times but not always
81.
The Rankine degree of the Rankine scale is exactly _____ as large as the Kelvin degree of the Kevin scale.
a)
9/5
b)
5/9
c)
4/9
d)
9/4
82.
The “thermal coefficient of linear expansion” refers to the extent to which the _____ of a solid changes per degree Celsius?
a)
Height
b)
Width
c)
Depth
d)
All of the above
83.
Unless otherwise stated, the heat of fusion is always expressed in:
a)
calories per gram
b)
kilocalories per gram
c)
calories per mole
d)
kilocalories per kilogram
84.
A kettle is placed on a stove. Heat is transferred from the burner of the stove to the water in the kettle. What is the type of heat called?
a)
Radiative heat
b)
Conductive heat
c)
Convective heat
d)
Physical heat
85.
Heat from an infrared lamp is an example of:
a)
radiative heat
b)
convective heat
c)
conductive heat
d)
all of the above
86.
In Physics, if Lf and Lv are latent heat of fusion and vaporization, respectively, which of the following equations apply in determining the amount of energy needed to freeze a liquid?
a)
Q = -mLf
b)
Q = -mLv
c)
Q = mLv
d)
Q = mLf
87.
The amount of heat needed to change solid to liquid is:
a)
condensation
b)
cold fusion
c)
latent heat of fusion
d)
solid fusion
88.
The amount of heat needed to raise the temperature of one pound of that substance one degree Fahrenheit is:
a)
specific heat
b)
btu
c)
latent heat
d)
calorie
89.
One gram of ice at 0°C is place on a container containing 2,000,000 cubic meters of water at 0°C. Assuming no heat loss, what will happen?
a)
Ice will become water
b)
Some part of ice
c)
The volume of ice will not change
d)
All of the above
90.
At what temperature readings do the Fahrenheit and Celcius scales have the same value?
a)
-30°
b)
-35°
c)
-40°
d)
-45°
91.
Indicate the FALSE statement about temperature.
a)
Boiling point of centigrade scale is 100°
b)
Fahrenheit scale was invented by a German.
c)
Absolute temperature scale is expressed in K.
d)
Absolute zero in Fahrenheit scale is -273°
92.
How does a calorie used by scientists differ with the calorie used by nutritionists?
a)
The calorie that scientists used is a much greater unit than that of the nutritionists.
b)
The calorie that scientists used is the same as the calorie used by nutritionists.
c)
The calorie that scientists used is a much smaller unit than that of the nutritionists.
d)
The calorie that scientists used is slightly greater than that of the nutritionists.
93.
The calorie used by scientists is _____ of the calorie used by nutritionists.
a)
1/100
b)
1/500
c)
1/1,000
d)
1/2,000
94.
The kilocalorie of the scientists is equal to the calorie of the nutritionists. This statement is:
a)
true
b)
false
c)
sometimes true but not always
d)
of no relation
95.
What refers to the amount of energy that will raise or lower the temperature of 1 kg of water by 1°C?
a)
Calorie
b)
British Thermal Unit
c)
Kilocalorie
d)
Specific heat
96.
The amount of heat required to change the temperature of 1 pound of water 1°F.
a)
Calorie
b)
Thermal energy
c)
Specific heat
d)
British Thermal Unit (BTU)
97.
Calorie is defined as the amount of heat required to raise a temperature of water 1°C.
a)
1 gram
b)
1 kilogram
c)
1 pound
d)
1 ton
98.
The amount of heat needed to change the temperature of a unit quantity of it by 1°.
a)
BTU
b)
Heat transfer
c)
Temperature
d)
Specific heat capacity
99.
What is specific heat?
a)
A temperature of 1 kg sample reported in °C.
b)
The heat needed to raise the temperature of 1 pound of water 1°F.
c)
The energy needed to raise the temperature of 1 gram of a substance 1°C.
d)
Any of the above
100.
The amount of heat that must be supplied to change 1 kg of the substance at its boiling point from the liquid state to the gaseous state.
a)
Heat fusion
b)
Heat vaporization
c)
Specific heat
d)
BTU
101.
The amount of heat that must be supplied to change 1 kg of the substance at is melting point from the solid to the liquid state.
a)
Heat of fusion
b)
Heat of vaporization
c)
Specific heat
d)
BTU
102.
What refers to the temperature and pressure at which water can exist as vapor, liquid and ice in equilibrium?
a)
Tri-state point
b)
Triple point
c)
Equilibrium point
d)
Three-state point
103.
What takes place when a substance is heated to high temperature or when it is placed in intense electrical field?
a)
Radiation
b)
Fission
c)
Fusion
d)
Ionization
104.
Suppose that the speed of an object (in m/s) is v and the mass of the object (in kg) is m, which of the following represents the magnitude of the momentum?
a)
mv²
b)
m²v
c)
mv
d)
½ mv²
105.
The transmission of heat from one place to another by fluid circulation between the spots of different temperature is called:
a)
convection
b)
radiation
c)
conduction
d)
conservation
100 %
