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WorksheetsPhysics, First Semester Exam 2018
Total questions: 75
Worksheet time: 2hrs 20mins
Name
Class
Date
1.
The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.
a)
True
b)
False
2.
What is the Unit for Torque
a)
Nm
b)
N
c)
M
d)
no unit
3.
The direction is changed if...
a)
MA<1
b)
MA=1
c)
MA>1
d)
all of the above
4.
What is an example of a 1st class lever?
a)
broom
b)
tweezers
c)
wheel barrel
d)
scissors
5.
What is an example of a 2nd class lever?
a)
scissors
b)
wheel barrel
c)
bat
d)
fishing pole
6.
What is an example of a 3rd class lever?
a)
nut cracker
b)
fishing pole
c)
scissors
d)
car door
7.
When on a bike going downhill, what happens to the speed and torque?
a)
Speed decreases; torques increases
b)
Speed decreases; torques decreases
c)
Speed increases; torques decreases
d)
Speed increases; torques increases
8.
When speed decreases, what happens to the value of torque?
a)
increases
b)
decreases
c)
stays constant
9.
A person on the Earth weighs 180 pounds. How much will they weigh on the moon? ( Note: The moons "g" is1/6 that of Earth)
a)
30 lbs
b)
360 lbs
c)
0- you are weightless in space
d)
18 lbs
10.
Kepler's second law that refers to the amount of distance covered in equal time intervals along an orbit is referred to as ____________.
a)
the Law of Ellipses
b)
the Law of Equal Areas
c)
the Law of Harmonies
d)
the Law of Universal Gravitation
11.
Kepler's first law that refers to the shape of planetary orbits is called ___________.
a)
the Law of Equal Areas
b)
the Law of Ellipses
c)
the Law of Harmonies
d)
the Universal Law of Gravitation
12.
The number 6.67 x 10 -11 N* m^2 / kg^2 is called the _______________.
a)
universal speed constant
b)
the speed force
c)
universal gravitational constant
d)
Earth's gravitational constant
13.
What is the Universal law of gravitation equation?
a)
G=F ⋅ m⋅m2/r2
b)
F=G ⋅ m⋅m2/(r)2
c)
F=G ⋅ r2/m⋅m2
d)
G=F ⋅ r2/m⋅m2
14.
What is gravitational force?
a)
a force that attracts any object
b)
a force that pushes any object
c)
a force that shrinks any object
d)
a force that enlarges anyobject
15.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
16.
Centripetal force is...
a)
the resultant force acting on a body moving at constant speed in a circle
b)
the outwards force acting on a body moving at constant speed in a circle
17.
Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.
a)
10 N
b)
20 N
c)
30 N
d)
40 N
18.
What happens to the centripetal force exerted on an object if you triple the velocity?
a)
it increases to 3X
b)
it decreases to 6X
c)
it increases to 6X
d)
it increases to 9X
19.
A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s. What is the radius of the loop?
a)
203 m
b)
8163 m
c)
80,003 m
d)
23 m
20.
In this type of collision, objects tend to "stick" together.
a)
elastic
b)
inelastic
c)
They "stick" together in both types of collisions
21.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
22.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
23.
A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?
a)
0 kgm/s
b)
30 kgm/s
c)
50 kgm/s
d)
10 kgm/s
24.
If 2 objects collide and stick together, what will happen to their velocities?
a)
velocities will increase
b)
velocities will decrease
c)
velocities will stay the same
d)
none of the above
25.
Why is pushing up a barrel up a ramp easier than lifting it up
a)
the reason why is because of fish
b)
the reason is because you are applying less force to push
c)
the reason why because you are using a machine
26.
Calculate the work done on a 12 N backpack that is lifted 1.5 m.
a)
18 J
b)
0 J
c)
8 J
d)
180 J
27.
A man of weight 900 N walks up a hill of height 10 m. What is the total work done?
a)
0 J
b)
90 J
c)
900 J
d)
9000 J
28.
What is mass?
a)
It is the amount of matter in a body
b)
It is the amount of force in a body
c)
it is the gravitational force acting on a body
d)
it is the kinetic force acting on a body
29.
What is weight?
a)
It is the amount of matter in a body
b)
It is the amount of force in a body
c)
it is the gravitational force acting on a body
d)
it is the kinetic force acting on a body
30.
If W=Fd
Then how much work is done if it takes 20N to move a box 10 meters
Then how much work is done if it takes 20N to move a box 10 meters
a)
0
b)
2
c)
20
d)
200
31.
Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
32.
What is the equation for work?
a)
W = mass * acceleration
b)
W = force * distance
c)
W = force/distance
d)
W = speed/time
33.
If 150 Joules of work is needed to move a box 10 meters, what force was used?
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
34.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
35.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
36.
Balanced or Unbalanced?
a)
Balanced
b)
Unbalanced
37.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
38.
When you step on a Lego. You push on the Lego and the Lego pushes back on you.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
39.
A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.
a)
The Law of Inertia
b)
The Law of Acceleration
c)
The Law of Conservation of Momentum
40.
Objects tendency to resist change
a)
Friction
b)
Inertia
c)
Force
d)
Gravity
41.
Speed is
a)
the distance covered per unit of time
b)
the time it takes something to move a certain distance
c)
distance x time
d)
time x distance
42.
Any change in position.
a)
acceleration
b)
speed
c)
motion
d)
force
43.
What is the person doing from 5 seconds to 10 seconds?
a)
Walking
b)
Running
c)
Standing Still
d)
Walking Fast
44.
When an unbalanced force acts on an object, the force...
a)
Changes the motion of the object
b)
Is canceled by another force
c)
Does not change the motion of the object
d)
Is equal to the weight of the object
45.
What is the standard unit force is measured in?
a)
Newtons
b)
pounds
c)
grams
d)
meters
46.
The picture of the position vs. time graph shows an object that is...
a)
accelerating/speeding up
b)
moving at a constant speed
c)
not moving
d)
accelerating/slowing down.
47.
What is a force that works AGAINST MOTION?
a)
Force
b)
Motion
c)
Gravity
d)
Friction
48.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
49.
A projectile is an object that:
a)
is acted upon only by gravity.
b)
travels at a constant horizontal velocity
c)
accelerates at -9.8 m/s2
d)
all of the above
50.
If you throw a baseball straight up, what is its velocity at the highest point?
a)
9.8 m/s2
b)
9.8 m/s
c)
0 m/s2
d)
0 m/s
51.
A bullet is fired horizontally at a height of 1.3 meters at a velocity of 950 m/s. Assume no air resistance. How long until the bullet reaches the ground?
a)
0.52 s
b)
0.27 s
c)
0.13 s
d)
0.36 s
52.
What is the vertical acceleration of a projectile?
a)
0 m/s2
b)
-9.8 m/s2
c)
0 m/s
d)
-9.8 m/s
53.
The horizontal component of a projectile's velocity is independent of...
a)
it's range
b)
time
c)
the vertical component
d)
none of these
54.
If I throw a crayon straight up at 12 m/s, how fast is its velocity when I catch it at the same height?
a)
-6 m/s
b)
-12 m/s
c)
-18 m/s
d)
-24 m/s
55.
Motion is the change of position during an interval of time.
a)
True
b)
False
56.
The equations of motion apply only if
a)
displacement is constant
b)
motion is horizontal
c)
acceleration is constant
d)
velocity is constant
57.
The equations of linear motion apply only if
a)
system velocity is constant.
b)
system acceleration is constant.
c)
the total motion of a system is in one dimension
within its reference frame.
d)
system acceleration is nonzero.
58.
Two-dimensional acceleration is the
a)
slope of a position-time graph.
b)
the area underneath a position-time graph.
c)
the area underneath a velocity-time graph.
d)
slope of a velocity-time graph.
59.
Which is a possible unit for acceleration?
a)
ft2/s2
b)
m/s
c)
ft/s2
d)
m2/s
60.
Which change results in zero acceleration of a system?
a)
d.
a change in only the time interval in which
direction and velocity are measured
b)
a change in only the direction of velocity
c)
a change in only the magnitude of velocity
d)
a change in both the magnitude and direction of
velocity
61.
Which one of the choices does not give you displacement, velocity, or acceleration
a)
area under a velocity-time graph
b)
slope of a velocity-time graph
c)
slope of a position-time graph
d)
area under a position-time graph
62.
The speedometer on your car measures
a)
average speed.
b)
average velocity
c)
instantaneous speed.
d)
instantaneous velocity.
63.
Which of the following is not a vector quantity?
a)
acceleration
b)
displacement
c)
velocity
d)
speed
64.
The slope of a two-dimensional position-time graph gives
a)
displacement.
b)
distance.
c)
velocity.
d)
acceleration.
65.
Which of the following is a scalar quantity?
a)
displacement
b)
force
c)
velocity
d)
speed
66.
Five darts strike near the center of a target. The dart thrower is
a)
accurate
b)
precise
c)
both accurate and precise
d)
neither accurate nor precise
67.
A lack of precision in scientific measurements typically arises from
a)
limitations of the measuring instrument
b)
human error
c)
lack of calibration
d)
too many significant figures
68.
The SI base unit for time is
a)
1 day
b)
1 hour
c)
1 minute
d)
1 second
69.
The SI base unit used to measure mass is the
a)
meter
b)
kilometer
c)
gram
d)
kilogram
70.
The symbol mm represents a
a)
micrometer
b)
megameter
c)
millimeter
d)
manometer
71.
What two dimensions, in addition to mass, are commonly used by physicists to derive additional measurements?
a)
length and width
b)
area and mass
c)
length and time
d)
velocity and time
72.
Which statement about models is not correct?
a)
Models describe only part of reality
b)
models help build hypotheses
c)
models help guide experimental design
d)
Models manipulate a single variable or factor in an experiment
73.
Why do physicists use models?
a)
to explain the complex features of simple phenomena
b)
to describe all aspects of a phenomenon
c)
to explain the basic features of complex phenomena
d)
to describe all of reality
74.
In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses?
a)
interpreting results
b)
stating conclusions
c)
conducting experiments
d)
making observations and collecting data
75.
according to the scientific method, why does a physicist make observations and collect data?
a)
to decide which parts of a problem are important
b)
to ask a question
c)
to make an interpretation
d)
to solve all problems
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