AnswersPOP Physics 2627Impulse and Momentum

Impulse and Momentum Answers

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What best describes an impulse acting on an object?

A
the net force on an object divided by the time of impact
B
the velocity of an object divided by its mass
C
the product of an object's mass and the time of force impact
D
the product of an object's mass and its change in velocity
2
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What are possible units for impulse? Check all that apply.

Question illustration
A
kg • m
B
kg •
Option B
C
N • s
D
N • m
E
StartFraction Newtons times meters per second EndFraction
Option E
3

An object with a mass of 1.5 kg changes its velocity from +15 m/s to +22 m/s during a time interval of 3.5 seconds. What impulse was delivered to the object?

A
3.0 N • s
B
11 N • s
C
25 N • s
D
56 N • s
4

A boy and his skateboard have a combined mass of 65 kg. What is the speed of the boy and skateboard if they have a momentum of 275 kg • ?

Question illustration
A
0 m/s
B
0.24 m/s
C
4.2 m/s
D
8.5 m/s
5

Four identical lab carts each have a mass of 200 kg. Different masses are added to the carts and the velocities are measured. All carts move to the right.Which cart has the greatest momentum?

Question illustration
A
cart A
B
cart B
C
cart C
D
cart D
6

Which formulas show the relationships between momentum, mass, and velocity? Check all that apply.

Question illustration
A
p = mv
B
p =
Option B
C
p =
Option C
D
m =
Option D
E
p =
Option E
F
v =
Option F
G
v =
Option G
7

What is the SI unit for momentum?

A
kg • m
B
kg •
Option B
C
kg •
Option C
D
kg •
Option D
8

A car’s momentum is p when it is traveling with a velocity of v. If the velocity of that car doubles, what is the new momentum of the car?

A
p
Option A
B
p
C
2p
D
4p
9

A 57 g tennis ball is traveling at 45 m/s to the right, when it hits a racket. The ball reverses direction and travels at 33 m/s. The ball is in contact with the racket for 0.0085 s.

A
1.8 N
B
12 N
C
81 N
D
520 N
10

Students are completing a lab in which they let a lab cart roll down a ramp. The students record the mass of the cart, the height of the ramp, and the velocity at the bottom of the ramp. The students then calculate the momentum of the cart at the bottom of the ramp.Which trial’s cart has the greatest momentum at the bottom of the ramp?

Question illustration
A
trial 1, because this trial has the greatest velocity
B
trial 2, because this trial has the greatest ramp height
C
trial 3, because this trial has a large mass and a large velocity
D
trial 4, because this trial has the greatest mass
11

A baseball has a mass of 0.45 kg and is thrown with a speed of 25 m/s. What is the momentum of the baseball?

A
0.018 kg •
Option A
B
11 kg •
Option B
C
56 kg •
Option C
D
140 kg •
Option D
12

What type of relationship exists between momentum and mass?

A
direct
B
inverse
C
logarithmic
D
quadratic
13

A 0.25 kg baseball is in contact with a bat for 0.0075 s and exerts a force of 18,500 N. What impulse is delivered to the ball?

A
33 kg •
Option A
B
140 kg •
Option B
C
4600 kg •
Option C
D
74,000 kg •
Option D
14

What are possible formulas for impulse? Check all that apply.

Question illustration
A
J = Ft
Option A
B
J =
Option B
C
J = Fv
Option C
D
J =
Option D
E
J = mv
Option E
F
J = p
Option F
15

Different forces were applied to five balls, and each force was applied for the same amount of time. The data is in the table.

Question illustration
A
It divides in half.
B
It does not change.
C
It doubles.
D
It quadruples.

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