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Chapter 3: Dynamics of Linear Motio (C1 & C2)

Total questions: 42

Worksheet time: 1hrs 24mins

Name
Class
Date
1.

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

2.
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
3.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
4.
The law of conservation of momentum states that, 
a)
p before is less than p after
b)
p before is the same as p after
c)
p before is more than p after
5.
In any collision (crash) the ______ is ALWAYS constant.
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
6.
Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds.  Which cart experiences the greatest impulse?
a)
Cart B
b)
Cart A
c)
they are the same
7.
How can a tennis ball and a bowling ball have the same momentum?
a)
have the same speed
b)
have different speeds
c)
one is moving backwards
d)
they can't
8.

When a cannon fires a cannon ball, it recoils backwards. This occurs because of...

a)

Energy in the system is conserved

b)

Energy in the system is increased

c)

Momentum in the system is conserved

d)

Energy in the system is not conserved

9.

In an elastic collision...

a)

only momentum is conserved

b)

only energy is conserved

c)

both momentum and energy are conserved

d)

neither momentum nor energy are conserved

10.

Suppose a ping-pong ball and a bowling ball are rolling toward you. Both have the same momentum, and you exert the same force to stop each. How do the time intervals to stop them compare?

a)

Less time for the ping-pong ball

b)

Times are equal

c)

More time for the ping-pong ball

11.
The impulse-momentum theorem states that
a)
the impulse on an object is equal to the change in momentum it causes 
b)
the force on a moving object is equal to the magnitude of the impulse.
c)
the impulse on an object is greater than the change in momentum it causes 
d)
the impulse on an object is less than the change in momentum it causes
12.

During a collision. an object experiences an impulse. How can this impulse be calculated?

a)

Multiplying force by time

b)

Multiplying mass by velocity

c)

Dividing velocity by time

d)

Multiplying mass by acceleration

13.

During a collision. an object experiences an impulse. The impulse causes and is equal to the _____ of the object

a)

energy change

b)

kinetic energy change

c)

force

d)

momentum

e)

momentum change

14.

A sailboat of mass m is moving with a momentum p. How would you represent its kinetic energy in terms of these two quantities?

a)

K =p22mK\ =\frac{p^2}{2m}

b)

K = 12mp2K\ =\ \frac{1}{2}mp^2

c)

K = mpK\ =\ mp

d)

K = mp2K\ =\ \frac{mp}{2}

15.
The purpose of crumble zones on a car is to
a)
decrease time of impact.
b)
increase force of impact.
c)
increase the time of impact.
d)
decrease the impulse during impact.
16.

Check ALL that apply.

Impulse is:

a)

The force that creates an acceleration.

b)

The change in momentum.

c)

the change in velocity that can be caused by a constant force over some discrete amount of time.

d)

A vector

e)

A scalar

17.

The area under the curve on a Force versus time ( F vs t) graph represents

a)

Impulse

b)

Momentum

c)

Work

d)

Kinetic energy

18.

A freight car moves along a friction less level railroad track at constant speed. The car is open on top. A large load of coal is suddenly dumped into the car. What happens to the velocity of the car?

a)

It increases

b)

It remains the same

c)

It decreases

d)

Cannot be determined from the information given

19.

Impulse is defined as the product of force and time during which the forces act, J = F.t.


Impulse is produced by a FORCE called :

a)

Applied force

b)

Normal force

c)

Gravitational force

d)

Impulsive force

20.
Airbags save your face by
a)
decreasing the impulse of the collision
b)
increasing the impulse of the collision
c)
decreasing the time of the collision
d)
increasing the time of the collision
21.
If an action force is a golf club hitting a golf ball, then the reaction force is
a)
exerted on the golf ball
b)
exerted on the golf cart
c)
exerted on the golf club by the golf ball
d)
exerted by the squirrel that is hiding in the tree
22.

Force is a vector.

a)

True

b)

False

23.
Which of the following is a force?
a)
Mass
b)
Gravity
c)
Weight
d)
Speed
24.

Forces acting on an object are represented by ____________

a)

arrows only

b)

a box or a dot only

c)

a free body diagram

d)

A force body diagram

25.

What symbol do we use to represent a "body" in a free-body diagram?

a)

small dot

b)

small figure

c)

an outline of a human body

d)

small triangle

26.

How is a force represented in a Free Body Diagram?

a)

A straight line with an arrowhead

b)

A curved line with an arrowhead

c)

An arc with an arrowhead

d)

Multiple lines with arrowheads

27.

The force exerted by ropes and chains is called

a)

tension

b)

normal

c)

elastic

d)

mechanical

28.

The Coffee cup in the picture is resting on a table. What force(s) are missing from the free body diagram?

a)

No forces are missing

b)

The normal force from the table pushing the cup up.

c)

The normal force form the table pushing the cup down.

d)

The friction force from the table pushing the cup left and right.

29.

The Car in the picture is moving to the right at a constant velocity. Any friction present would be pushing the car to the ...

a)

Up

b)

Right

c)

Down

d)

Left

30.

A man pushes a box across the floor at a constant velocity. There is a force on the box pulling it toward the center of the earth. This is called the

a)

force of gravity

b)

normal force

c)

friction force

d)

applied force

31.
What is the direction of the force of gravity acting on the box?
a)
down the ramp to the right
b)
straight up
c)
straight down
d)
up the ramp to the left
32.
A box is moving to the left up a ramp. Which way is the force of friction pointing?
a)
down the ramp to the right
b)
up the ramp to the left
c)
there is no friction
d)
straight up
33.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
34.

Which equation would accurately describe the forces on this cup of coffee?

a)

Fn − Fg = 0F_n\ -\ F_g\ =\ 0

b)

Fn×Fg = 0F_n\times F_g\ =\ 0

c)

Fn−10FgF_n-10F_g

d)

Fn−Fg = −10F_n-F_g\ =\ -10

35.

A chandelier is hanging from the ceiling. If the force of gravity on the chandelier is 120 N, the force of tension must be ...

a)

0 N

b)

12 N

c)

60 N

d)

120 N

36.

When determining the NET force on an object you should (TWO correct answers)

a)

subtract forces in opposite directions

b)

add forces in the same direction

c)

divide by velocity

d)

multiply by acceleration

37.

Which of the following is the same as INERTIA? (pick two)

a)

object at rest

b)

object moving at a constant velocity

c)

momentum

d)

force

38.
Is it BALANCED? 
a)
Yes
b)
No
39.

Ted is trying to move a fridge through his house, he gets stuck on a carpet and even though he is pushing the fridge, it is not moving. What force is acting against him?

a)

applied

b)

static friction

c)

kinetic friction

d)

normal

40.

Which of the following statements is true about the image above?

a)

The accelerations of the blocks will vary according to their mass

b)

The net force acting on each block is the same

c)

The blocks will experience the same acceleration

d)

The 3m box will eat the 2m and the m boxes

41.

Which of the following is not true about the system?

a)

T3 is equal to the scalar sum of the magnitudes of T2 and T1

b)

T3 is equal in magnitude to Fg

c)

The x- components of the T1 and T2 and equivalent but in opposite directions

d)

The system is in equilibrium.

42.

If there is no friction, then the acceleration would be equal to

a)

mg

b)

sin(θ)mg

c)

g

d)

sin(θ)g

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