WorksheetsUnit 5: Momentum & its Conservation FINAL EXAM REVIEW JUNE 2019
Total questions: 50
Worksheet time: 3hrs 30mins
Which of the following objects has momentum?
A. A pencil at rest on your desk.
B. A football played running down the field at a constant velocity
C. A car parked in front of Legal Prep.
D. Both B & C
Which of the following objects DO NOT have momentum?
A. The phone on Mr. B’s desk
B. A basketball player running to make a basket.
C. A car driving down Washington Avenue.
D. Both B & C
A 4,000 kg truck is moving north at 1 m/s in traffic, and a 2,000 kg car is moving north at 30 m/s on the highway. Which of the following statements best compares the truck and the car?
A. The truck has less momentum than the car
B. The truck has less inertia than the car
C. The truck has more mass but less weight than the car
D. The truck has more kinetic energy but less potential energy than the car
The momentum of an object is:
A. Independent of its velocity
B. Independent of its inertia
C. Dependent on its potential energy
D. Dependent on its mass
What is required to stop momentum?
A. Impulse
B. Time
C. Force
D. Mass
What is the basic formula for momentum?
A. F=ma
B. p=mv
C. a2+b2=c2
D. e=mc2
Which of the following objects will be the hardest to stop?
A. A 6300 kg elephant moving east at a speed of 0.11 m/s
B. A 60 kg deer moving west at a speed of 16.4 m/s
C. A 0.42 kg soccer ball moving downfield at a speed of 12 m/s
D. A 0.03 kg arrow moving toward a target at a speed of 150 m/s
A basketball has a mass of 5 kg and a velocity of 3 m/s. What is the momentum of the basketball?
A. 15 m/s
B. 1.5 kg
C. 15 kg*m/s
D. 8 m/s
A basketball has a momentum of 15 kg * m/s. The velocity of the basketball is 5 m/s.
What is the mass of the basketball?
A. 15 m/s
B. 0.33 kg
C. 3 kg
D. 5 kg * m/s
A basketball has a momentum of 15 kg * m/s. The mass of the basketball is 3 kg.
What is the velocity of the basketball?
A. 5 m/s
B. 0.33 kg
C. 3 kg
D. 5 kg * m/s
TRUE OR FALSE: A tiger and a small kitten are running at the same speed. The tiger has less momentum because it has more mass.
TRUE
FALSE
TRUE OR FALSE: A simple way to describe momentum would be “Mass is Motion.”
TRUE
FALSE
TRUE OR FALSE: Momentum depends on mass and velocity.
TRUE
FALSE
TRUE OR FALSE: Momentum is a scalar quantity.
TRUE
FALSE
TRUE OR FALSE: You are experiencing momentum sitting at your desk taking this exam.
TRUE
FALSE
TRUE OR FALSE: The more momentum an object has, the more force is needed to stop it.
TRUE
FALSE
TRUE OR FALSE: As mass increases, momentum increases.
TRUE
FALSE
TRUE OR FALSE: As velocity increases, momentum increases.
TRUE
FALSE
TRUE OR FALSE: The momentum of an object can change.
TRUE
FALSE
What is the correct definition of impulse?
a. The measure of mass in motion
b. Change in force
c. Change in momentum over time
d. The movement of an object when a force is applied to that object
What is the formula for impulse?
a. F = ma
b. p = mv
c. a2+b2=c2
d. i = Ft
What three things can happen to an object in order to make it experience impulse?
a. An increase in force, an increase in time, and a change in mass.
b. An increase in force, an increase in time, and a change in mass.
c. An object speeds up, slows down, or changes direction.
d. The object changes its mass, there is a change in speed, and a change in direction
What is the symbol for momentum change?
a. F
b. Δp
c. i
d. J
A 6 kg ball has encounters a force of 15 N in 2.0 seconds. What is the impulse of the object?
a. 300 N*s
b.90 kg*m/s
c.30 N*s
d. 12 kg*m/s
If an 80 kg object experiences 20 N of force in 4 seconds. What is the impulse of the object?
a. 1,600 N*s
b.80 N*s
c.240 N*s
d. 320 N*s
What is the momentum change of the object in the question above?
a.90 N*s
b.1,800 kg*m/s
c.80 N*s
d. 80 kg*m/s
If a 5kg object experiences 10N of force in 0.1 seconds. What is the impulse of the object?
a. 50 N*s
b.10 N*s
c.1 N*s
d. 320 N*s
If an 8 kg object experiences 25 N of force in 4.0 seconds. What is the momentum change of the object?
a. 100 N*s
b. 32 kg*m/s
c.240 kg*m/s
d. 100 kg*m/s
Since impulse is equal to the change in momentum, calculate for the missing data in the table for:
FORCE (N) NUMBER 29
a. (-2000) N*s
b. (-4000) N
c. (-6500) N*s
d. (4000) N
Since impulse is equal to the change in momentum, calculate for the missing data in the table for:
IMPULSE (N*s) NUMBER 30
a. (-40) N*s
b. (-40) N
c. (-70) N
d. (-90) N*s
Since impulse is equal to the change in momentum, calculate for the missing data in the table for:
IMPULSE (N*s) NUMBER 30
a. (-20) kg
b. (-30) kg*m/s
c. (-40) kg
d. (-40) kg*m/s
TRUE OR FALSE: The unit for momentum is the same as the unit for momentum change.
TRUE
FALSE
TRUE OR FALSE: Impulse is the change in mass.
TRUE
FALSE
TRUE OR FALSE: Decreasing the force during a collision results in less harm in a collision.
TRUE
FALSE
TRUE OR FALSE: An impulse happens when there is a collision of a force is applied.
TRUE
FALSE
TRUE OR FALSE: During an impulse event, an object experiences a force for a specific amount of time that results in a change in momentum.
TRUE
FALSE
TRUE OR FALSE:The impulse experienced by an object does not equals the change in momentum of the object.
TRUE
FALSE
During a collision, momentum is:
a. Transferred
b. Destroyed
c. Created
d. None of the above
Object X is at rest on a horizontal sheet of ice. Object Y slides across the ice with an initial velocity of 10 m/s and collides with object X. Object Y stops and object X begins to move. Both objects have the same mass. Assume friction is negligible.
a.Object X moves away at a velocity that is less than 10 m/s, and momentum is conserved.
b. Object X moves away at a velocity that is less than 10 m/s, and momentum is not conserved
c.Object X moves away at 10 m/s, and momentum is conserved
d. Object X moves away at 10 m/s, and momentum is not conserved
Two pop cans are at rest on a table. A firecracker is set between them and lit. The firecracker explodes and exerts and equal and opposite force on both cans. What is true regarding the post-explosion momentum of the system?
a. It is definitely zero
b. It is dependent upon the mass of the two cans
c. It is dependent upon the velocities of the two cans, but not the mass
d. It is dependent upon the cans being upright or on their sides.
Object B has a mass of 50 kg. Object B collides with another object. If the momentum of Object B after the collision is 250 kg*m/s, what is its velocity?
A. 5 m/s
B. 5 kg*m/s
C. 5 N*s
D. 5 kg
What is the combined momentum of Objects Alpha (50 kg*m/s) and Object Beta (50 kg*m/s)?
A. 250 kg*m/s
B. 100 kg*m/s
C. 100 N*s
D 250 N*s
TRUE OR FALSE: The momentum of a system remains the same after a collision.
TRUE
FALSE
TRUE OR FALSE: Increasing the time will decrease the force.
TRUE
FALSE
TRUE OR FALSE: Decreasing the force during a collision results in less harm to the object in the collision.
TRUE
FALSE
TRUE OR FALSE: The basic formula for the conservation of momentum in a closed system is m1v1 = m2v2
TRUE
FALSE
A brick is dropped into a cart, which was moving at 5 m/s. After the brick stops and landed in the cart, the velocity of the cart has slowed down to 1 m/s. Which statement is true?
A. The mass of the cart and brick combined has slowed down the cart.
B. The cart’s momentum increases, and brick’s momentum decreases.
C. The brick’s momentum is unchanged, and the cart’s momentum decreases.
D. The cart’s momentum is unchanged, and the brick’s momentum increases.
ALMOST DONE! Look at the next two questions, 49 and 50. IN YOUR PACKET. What types of collisions are expressed in questions?
A. Questions 49 and 50 both demonstrates an elastic collisions.
B. Question 49 demonstrates an elastic collision whereas Question 50 demonstrates an inelastic collision.
C. Questions 49 and 50 both demonstrate inelastic collisions.
D. Question 49 demonstrates an inelastic collision whereas Question 50 demonstrates an elastic collision
A 10 kg shark swimming at 5m/s swallows an absent-minded 0.5 kg fish that is originally at rest.
What is the speed of the large fish after eating the smaller fish?
A. 4.76 m/s
B. 2.98 m/s
C. 5.90 m/s
D. 10.00 m/s
A 0.16 kg pool ball sliding to the right at 8.0 m/s has an elastic head-on collision with another 0.16 kg pool ball initially at rest. If the first ball stops after the collision, what is the velocity of the second pool ball after the collision?
A. 7 m/s
B. 6 m/s
C. 8 m/s
D. 14.02 m/s
