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Momentum, impulse and Newtons Laws

Total questions: 30

Worksheet time: 26mins

Name
Class
Date
1.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
2.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
3.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
4.
Which object has the greatest momentum?
a)
Object A
b)
Object B
c)
Object C
d)
cannot be determined
5.

Find the momentum of a 3.0 kg mass when it is stopped.

a)

0 kg*m/s

b)

need to know the velocity

c)

3.0 kg*m/s

d)

9.8 kg * m/s

6.
The impulse is ______ the change in momentum
a)
greater than
b)
equal to
c)
less than
d)
always double
7.

At what speed do the two blocks move after the collision?

a)

2 m/s

b)

5 m/s

c)

10 m/s

8.
Determine the momentum of 1000-kg car moving southward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s south
d)
10000 kg * m/s south
9.

What is the unit for momentum?

a)

m/sec

b)

kg/sec

c)

kg/m

d)

kg x m/sec

10.

What is the unit for velocity?

a)

m/sec

b)

kg/sec

c)

kg/m

d)

kg x m/sec

11.
A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball. 
a)
55 kg*m/s
b)
100 kg*m/s
c)
250 kg*m/s
d)
500 kg*m/s
12.

If an object has a momentum of 40 kg x m/s and a mass of 60 kg, what is it's velocity?

a)

2400 m/s

b)

1.5 m/s

c)

240 m/s

d)

.67 m/s

13.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
14.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
15.
A .030 kg bullet is fired from a gun with a speed of 350 m/s. If the gun has a mass of 0.9 kg, What is the recoil speed of the gun?
a)
11.7 m/s
b)
9.0 m/s
c)
10.5 m/s
d)
10 m/s
16.

The Law of Conservation of Momentum states:

a)

The total momentum before a collision is equal to the total momentum after a collision.

b)

The total momentum before a collision is greater than the total momentum after a collision.

c)

The total momentum before a collision is less than the total momentum after a collision.

d)

The total momentum before a collision is not related to the total momentum after a collision.

17.

According to Newton's Laws, for every action there is an ....

a)

equal and opposite reaction.

b)

equal and parallel reaction.

c)

unequal and opposite reaction.

d)

unequal and unrelated reaction.

18.
A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg,  collides with a smaller box with a mass of 2 kg that is stationary.  The boxes stick together. What is the velocity of the two combined masses after collision?
a)
0 m/s
b)
4 m/s
c)
8 m/s
d)
12 m/s
19.

What is the symbol for momentum?

a)

p

b)

m

c)

M

d)

mo

20.

A 7.5 kg purple bowling ball is rolling down the lane at 5 m/s. A 7.5 kg red bowling ball is rolling down another lane at 5 m/s. Which of the following statements is true?

a)

Both bowling balls have the same momentum.

b)

The purple bowling ball has a greater momentum.

c)

The red bowling ball has a greater momentum.

d)

The momentums of the bowling balls cannot be determined.

21.
If these boys are pulling with the same amount of force.  What will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
22.
Which force produces a change in motion?
a)
unbalanced force
b)
balanced force
c)
gravitational force
d)
frictional force
23.

If you double the mass of an object but apply the same force apply on it, the acceleration will __________________.

a)

double

b)

cut in half

c)

the same

d)

zero

24.
What kind(s) of objects have inertia?
a)
all objects with mass
b)
only objects at rest
c)
only objects in motion
d)
only objects whose motion is being changed
25.

Which one of Newton’s Laws of Motion best explains why the dishes do not move when the tablecloth is removed?

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

26.

A car speeding up to get through a yellow traffic light is an example of .... (select all that apply)

a)

balanced Forces

b)

unbalanced Forces

c)

acceleration

27.

Which type of force(s) will cause a change in an object's motion?

a)

gravity

b)

zero net force

c)

balanced forces

d)

unbalanced forces

28.

An impulse depends on

a)

weight and force

b)

force and time

c)

electric charge and time

d)

none of these

29.

If the change of momentum of an object is 50kg m/s, we can say the impulse is equal to:

a)

0 kg m/s

b)

25 kg m/s

c)

50 kg m/s

d)

100 kg m/s

30.
Softer landings tend to
a)
increase impact force
b)
increase force
c)
increase collision time
d)
increase change in momentum

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