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WorksheetsPhysics fall semester review
Total questions: 64
Worksheet time: 32mins
WHICH OF THE FOLLOWING SITUATIONS IS AN EXAMPLE OF A SIGNIFICANT CHANGE IN MOMENTUM?
A TENNIS BALL IS HIT INTO A NET.
A HELIUM-FILLED BALLOON RISES UPWARD INTO THE SKY.
AN AIRPLANE FLIES INTO SOME SCATTERED WHITE CLOUDS.
A BICYCLIST RIDES OVER A LEAF ON THE PAVEMENT.
THE IMPULSE EXPERIENCED BY A BODY IS EQUIVALENT TO THE BODY’S CHANGE IN
momentum
acceleration
A 20 KG SHOPPING CART MOVING AT A VELOCITY OF 0.5 M/S COLLIDES WITH A STORE WALL AND STOPS. THE MOMENTUM OF THE SHOPPING CART
increases
decreases
stays the same
A SOCCER BALL COLLIDES WITH ANOTHER SOCCER BALL AT REST. THE TOTAL MOMENTUM OF THE BALLS
increases
decreases
remains constant
THE LAW OF CONSERVATION OF MOMENTUM STATES THAT
THE TOTAL INITIAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER USUALLY EQUALS THE TOTAL FINAL MOMENTUM.
THE TOTAL INITIAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER DOES NOT EQUAL THE TOTAL FINAL MOMENTUM.
THE TOTAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER IS ZERO.
THE TOTAL MOMENTUM OF ALL OBJECTS INTERACTING WITH ONE ANOTHER REMAINS CONSTANT REGARDLESS OF THE NATURE OF THE FORCES BETWEEN THE OBJECTS.
A CHILD WITH A MASS OF 23KG RIDES A BIKE WITH A MASS OF 5.5 KG AT A VELOCITY OF 4.5 M/S TO THE SOUTH. COMPARE THE MOMENTUM OF THE CHILD WITH THE MOMENTUM OF THE BIKE.
The child has a greater momentum because it has a larger mass.
They both have the same momentum
the bike has more momentum.
CARS ARE EQUIPPED WITH PADDED DASHBOARDS. IN COLLISIONS, THE PADDED DASHBOARDS WOULD BE SAFER THAN NON-PADDED ONES BECAUSE THEY
Increase the impact time
Increase the occupant’s impulse
Decrease impact force
all are true
only A and C are true
When calculating gravity between two objects, the distance should be measured between
The outside edges of both objects
The inside edges of both objects
The middle of both objects
The center of one object to the edge of the other object
Why does an astronaut weigh less on the moon?
The astronaut has less mass on the moon.
The astronaut is farther from Earth’s center when he or she is on the moon.
The gravitational field strength is less on the moon’s surface than on Earth’s surface.
The astronaut is continually in free fall because the moon orbits Earth.
If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.
go straight up
fall straight down
follow a curved path
travel horizontally
Which of the following statements applies to the motion of a ball rising and then falling in free fall?
1. The ball has constant acceleration as it moves upward.
2. The ball has zero acceleration at the very top of its path.
3. The ball has constant acceleration as it moves downward.
4. All of the above apply to this situation.
5. 1 and 3 only above
Objects that are falling toward Earth in free fall move
1. faster and faster (9.8 m/s2) .
2. at a constant velocity (9.8 m/s2).
3. slower and slower(-9.8 m/s2).
4.slower then faster.
An object that is in free fall seems to be _____
not moving
Sped up by air resistance
slowed by air resistance
weightless
Kepler’s first law states that
the sun is the center of the solar system.
planets orbit the sun in elliptical orbits, with the sun located at one focus.
planets orbit the sun in circular orbits, with the sun located at the center.
gravity provides the force that holds the planets in orbit about the sun.
The size of the gravitational force between two objects depends on their ____.
frictional forces
inertia
masses and the distance between them
speed and direction
Kepler’s third law states that the ratio of
the orbital period to the orbital radius is the same for all planets.
the orbital periods of any two planets equals the ratio of the orbital radii.
all planets would orbit with the same orbital period.
the period squared to the radius cubed is the same ratio for all planets.
Satellite B is three times more massive than Satellite A. Which satellite experiences a stronger gravitational attraction with the earth?
A due to its mass
B due to its mass
A due to its distance from earth
B due to its distance from earth
Which of the following statements is correct about weight and mass?
Mass and weight both vary with location.
Mass varies with location, but weight does not.
Weight varies with location,but mass does not.
Neither mass nor weight varies with location.
Two balls are dropped at the same height. One ball is dropped from table height and the other initially moves horizontally across the table the then falls off the edge, as shown in the figure. If both balls are dropped at exactly the same time, which one will hit the ground first?
A because it has a shorter distance to fall.
B because is is already travelling down
Both hit at the same time due to gravity
THE KINETIC ENERGY OF AN OBJECT INCREASES AS ITS ____ INCREASES.
velocity
speed
mass
INCREASING THE SPEED OF AN OBJECT ____ ITS POTENTIAL ENERGY.
increases
decreases
does not affect
WHICH OF THE FOLLOWING DEVICES DOES NOT MAKE USE OF ELECTRICAL ENERGY?
Upright piano
Radio
Toaster
digital camera
ACCORDING TO THE LAW OF CONSERVATION OF ENERGY, THE TOTAL AMOUNT OF ENERGY IN THE UNIVERSE ____.
increases
Decreases
Remains Constant
WHICH OF THE FOLLOWING ENERGY FORMS IS ASSOCIATED WITH AN OBJECT IN MOTION?
Potential energy
Elastic Potential Energy
Nonmechanical Energy
Kinetic Energy
IF FRICTION IS THE ONLY FORCE ACTING ON AN OBJECT DURING A GIVEN PHYSICAL PROCESS, WHICH OF THE FOLLOWING ASSUMPTIONS CAN BE MADE IN REGARD TO THE OBJECT’S KINETIC ENERGY?
The kinetic energy decreases.
The kinetic energy increases.
The kinetic energy remains constant.
The kinetic energy decreases and then increases.
WHAT IS THE POTENTIAL ENERGY OF A 1.0 KG MASS 2.0 M ABOVE THE GROUND?
PE = m x g x h
g = 10 m/s2
13 J
20 J
19 J
21 J
WHAT IS THE RATE AT WHICH WORK IS DONE?
Power
Work
WHEN AN OBJECT IS LIFTED 10 M ABOVE THE GROUND, IT GAINS A CERTAIN AMOUNT OF POTENTIAL ENERGY. IF THAT SAME OBJECT IS LIFTED 20 M ABOVE THE GROUND, ITS POTENTIAL ENERGY GAIN WILL BE
Twice as much
the same
Less than
WHICH OF THE FOLLOWING IS TRUE?
A body with zero velocity cannot have any potential energy.
A body with zero acceleration cannot have any kinetic energy.
A body with zero acceleration cannot have any potential energy
A body with zero velocity cannot have any kinetic energy.
WHICH OF THE FOLLOWING IS A TRUE STATEMENT ABOUT THE CONSERVATION OF ENERGY?
Potential energy is always conserved.
Kinetic energy is always conserved
Mechanical energy is never conserved.
Total energy is always conserved.
WHICH OF THE FOLLOWING STATEMENTS BEST DESCRIBES THE RELATIONSHIP BETWEEN THE CART’S POTENTIAL ENERGY (PE), KINETIC ENERGY (KE), AND TOTAL MECHANICAL ENERGY (TME)?
As the PE increases, the KE and TME are also observed to increase.
As the PE increases, the KE decreases, but the TME remains relatively constant
The TME increases as the PE increases, but the KE remains relatively constant.
There seems to be no pattern in the manner in which the KE, PE and TME change.
WHICH COMBINATION OF KINETIC ENERGY (KE), POTENTIAL ENERGY (PE) AND TOTAL MECHANICAL
ENERGY (TME) VALUES WOULD BE EXPECTED WHEN THE CART IS LOCATED AT A POSITION OF 90 CM
(0.90 M) FROM ITS STARTING LOCATION?
KE = 0.43 J, PE = 0.68 J, TME = 1.11 J
KE = 1.80 J, PE = 1.63 J, TME = 3.43 J
KE = 1.63 J, PE = 1.80 J, TME = 3.43 J
KE = 0.26 J, PE = 0.85 J, TME = 1.11 J
A student recorded the following times as data for their lab.
Determine the average time for the 3 meter distance.
3m Time 3 (s)
7.25
7.20
7.23
7.21
7.20 s
5.37 s
7.22 s
24.08 s
A horizontal line on a velocity/time graph shows ____ acceleration.
positive
negative
changing
zero
Motion is a change in ____.
time
speed
velodity
position
10 m/s North is an example of a(n) ____.
speed
velocity
position
acceleration
If you ride your bicycle down a straight road for 500 m then turn around and ride back, your distance is ____ your displacement.
greater than
less than
equal to
can’t determine
A merry-go-round horse moves at a constant speed but at a changing ____.
velocity
balanced force
inertia
unbalanced force
A single point on a distance-time graph tells the ____.
instantaneous speed
average speed
constant speed
average velocity
If you ride your bike up a hill, then ride down the other side, your acceleration is ____.
all positive
all negative
first positive, then negative
first negative, then positive
Which graph above best represents the motion of an object starting at rest and accelerating uniformly?
A
C
D
none of the above
The relationship among mass, force, and acceleration is explained by ____.
conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
For any object, the greater the force that's applied to it, the greater its ____ will be.
acceleration
gravity
inertia
velocity
Which graph below best represents the relationship between velocity and time for an object which accelerates uniformily for 2 seconds, then moves at a constant velocity for 1 second, and finally decelerates for 3 seconds?
A
B
C
D
According to the graph above, during which interval is the cat at rest?
0.0-5.0 s
5.0-10.0 s
10.0-15.0 s
15.0-20.0 s
According to the graph above, during which interval does the cat have the greatest positive velocity?
0.0-5.0 s
5.0-10.0 s
10.0-15.0 s
15.0-20.0 s
According to the graph above, the cat has the fastest speed during which interval?
0.0-5.0 s
5.0-10.0 s
10.0-15.0 s
15.0-20.0 s
The graph above describes the motion of a cyclist. The graph illustrates that the acceleration of the cyclist
is constant
decreases
increases
is zero
The graph above describes the motion of a cyclist. During the interval shown, the cyclist is
slowing down
speeding up
traveling at the same speed
at rest
A 350-N force acts on a 25-kg object. The acceleration of the object is ____.
( a=F/m)
7,500 m/s2
14.0 m/s
0.07 m/s2
14 m/s2
Which of Newton’s laws best explains how objects accelerate when a force is applied?
1st law
2nd law
3rd law
Which of the following has the greatest momentum? (p= m x v)
a tortoise with a mass of 275 kg moving at a velocity of 0.55 m/s
a hare with a mass of 2.7 kg moving at a velocity of 7.5 m/s
a turtle with a mass of 91 kg moving at a velocity of 1.4 m/s
a roadrunner with a mass of 1.8 kg moving at a velocity of 6.7 m/s
A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____.
generates less friction
has greater mass
has less mass
has greater forward motion
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. The magnitude (or size) of the momentum of the rubber ball
increased
decreased
remained the same
was not conserved
When two balls collide, the momentum of the balls after the collision is explained by ____.
the law of conservation of momentum
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
READ THE PASSAGE: “Energy on an Inclined Plane” and answer the following 5 questions using the information presented in the passage.
Which graph should be used to determine the kinetic energy of the cart?
The position versus time graph must be used.
The velocity versus time graph must be used.
Both the position versus time graph and velocity vs time graph must be used.
Neither graph are used. Kinetic energy is calculated without using the graphs.
From the passage: At which of these times listed does the cart have the lowest kinetic energy?
At 1.10 seconds.
At 2.25 seconds.
At 2.55 seconds.
At 3.12 seconds.
From the passage: For which of the following positions does the cart have the greatest kinetic energy?
30 cm
50 cm
90 cm
140 cm
Assuming that each stair is the same height, the potential energy at position B would be
40 J
30 J
20 J
10 J
when the ball rolls down the incline, just before it strikes position E, its kinetic energy will be about
40 J
30 J
20 J
50 J
Which graph best represents the gravitational force F that a rocket experiences as it travels a distance D away from the surface of the earth? Note that RA represents the edge of the atmosphere.
A
B
C
D
Which of the following graphs below shows how the force on an object changes if the mass increases and the gravitational acceleration stays constant?
A
B
C
D
In the figure above, according to Kepler’s laws of planetary motion,
A1 = A2.
Δ t1 = Δ t2
Δ t1 > Δ t2
If Δ t1 = Δ t2, then A1=A2
In the free-body diagram shown above, which of the following is the gravitational force acting on the balloon?
1520 N
950 N
4050 N
5120 N
