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Newton's Laws

Total questions: 63

Worksheet time: 2hrs 2mins

Name
Class
Date
1.
If the net force acting on any moving object is zero, the object will
a)
accelerate
b)
come to a stop
c)
continue in motion in a straight line
d)
move in a circular path
2.
Which of the following is an acceptable unit for mass? 
a)
pounds
b)
kilograms
c)
Newton’s 
d)
tons
3.
A box slides along a rough concrete surface and comes to a stop.  Which of the following best explains why the box comes to a stop?
a)
it is the natural tendency of an object in motion to come to a stop
b)
the concrete exerts a frictional force on the box that opposes its motion 
c)
there is no force pushing the box forward, so it stops
d)
the mass of the box causes it to slow down
4.
The Free Body Diagram above shows the forces acting on a hockey puck in motion to the right.  Which of the following describe the motion of the hockey puck?
a)
the hockey puck moves to the right with constant velocity
b)
the hockey puck is slowing down
c)
the hockey puck is speeding up
d)
the hockey puck moves is a circle
5.
A group of pirates fire a cannon.  They notice that when a cannon ball is fired from the cannon, the cannon rolls backwards.  The cannon is much more massive than the cannon-ball. 
Which of the following best explains why the cannon rolls backwards?
a)
the force that is exerted on the cannon ball is so great some is reflected back on   the cannon 
b)
 the inertia of the cannon causes it to roll backwards when the mass changes 
c)
the cannon ball’s energy is released to the cannon
d)
there is an equal force on the cannon but in the opposite direction of the force on the cannon-ball. 
6.
A group of pirates fire a cannon.  They notice that when a cannon ball is fired from the cannon, the cannon rolls backwards.  The cannon is much more massive than the cannon-ball. 
Compared to the acceleration of the cannon ball, the acceleration of the cannon is
a)
greater
b)
equal
c)
less than
d)
cannot be determined
7.
A 400 N girl standing on a dock exerts a force of 100 N on a 10,000 N sailboat as she pushes it away from the dock. How much force does the sailboat exert on the girl?  
a)
25 N 
b)
100 N 
c)
 400 N
d)
10,000 N
8.
A group of students are pulling a bucket of mass 10.0 kg from the bottom of the well by tying a rope to the bucket and pulling upwards. Use g = 10 m/s2 to simplify calculations.
What is the weight of the bucket?
a)
0
b)
10
c)
100
d)
200
9.
A group of students are pulling a bucket of mass 10.0 kg from the bottom of the well by tying a rope to the bucket and pulling upwards at a constant velocity
What is the free body diagram for this situation? 
a)
A
b)
B
c)
C
d)
D
10.
A group of students are pulling a bucket of mass 10.0 kg from the bottom of the well by tying a rope to the bucket and pulling upwards.  Use g = 10 m/s2 to simplify calculations.
How much upward force must the students exert to raise the bucket at a constant velocity?
a)
0 N
b)
100 N
c)
120 N
d)
200 N
11.
A group of students are pulling a bucket of mass 10.0 kg from the bottom of the well by tying a rope to the bucket and pulling upwards.  Use g = 10 m/s2 to simplify calculations.
What is the net force on the bucket when the students apply 200.0 N of upward force?    
a)
0 N
b)
 90 N
c)
100 N
d)
200 N
12.
An object is moved upwards according to the position vs. time graph shown. Upwards is considered to be the positive y direction.
Which of the following Free Body Diagrams could show the forces acting on the object at t = 2 s?
a)
A
b)
B
c)
C
d)
D
13.

These two individuals are pushing a 5500 kg car with a horizontal force of 300 N. What is the Normal Force of the car?

a)

53,900 N

b)

300 N

c)

2940 N

d)

30.6 N

14.

Two students that are afraid of the Tardy Terminator are late to class.  They decide to take the elevator even though they are not allow.  Their mass is 40 kg each and the mass of the elevator is 220 kg.  Assume the elevator accelerates upward at 2.00 m/s².  What is the net force that acts on the elevator?

a)

300 N

b)

160 N

c)

2 N

d)

600 N

15.

A net force is acting on a 10 kg box produces an accelerate of 3.0 m/s².  What acceleration, to the nearest tenth, will the same net force cause on a 4 kg box? Only type the number.

(a)  

16.

This 75 kg bridge jumper leaped off a 20 m high bridge. Knowing Earth's gravity is acting on him, which statement best represents the reaction force to Earth's gravity?

a)

Earth is pulling on air with a force of 4.11 x10^4 N.

b)

Earth is pulling on water with a force of 3.66 x 10^12 N.

c)

The sun is pulling on Earth with a force of 5.97 x 10^24 N.

d)

The jumper is pulling on Earth with a force of 735 N.

17.

A net force acting on a 5 kg desk produces an acceleration of 5 m/s^2. What mass, to the nearest tenth, will the same net force cause on a desk accelerating at 12.5 m/s^2. Only type in a number.

(a)  

18.

This guy, who may or may not be Spiderman, jumps off a building to stop Green Goblin. His mass is 55 kg. Superheroes are subject to Earth's gravity. Which statement best describes the reaction force to Earth's gravity in this situation?

a)

Earth is pulling on the sun with a force of 5.97 x 10^24 N.

b)

Earth is pulling on Spiderman wannabe with a force of 539 N.

c)

Earth is pulling on air with a force of 5.61 x10^ 5 N.

d)

Earth is pulling on Green Goblin with a force of 4.99 x 10^7 N.

19.

These two chaps are moving this 200 kg box with a horizontal force of 600 N. What is the magnitude of the Normal Force?

a)

5880 N

b)

600 N

c)

1960 N

d)

61 N

20.

What is the amount of force needed to accelerate a 2 kg object at 10 m/s^2? Type only a number

(a)  

21.

A vendor and his hot dog cart are in an elevator at AT&T Stadium.  The vendor has a mass of 50 kg and his cart is 20 kg, hot dogs included.  The elevator has a mass of 300 kg.  The elevator accelerates upwards at 1 m/s².  What is the upward force acting on the elevator?

a)

70 N

b)

370 N

c)

300 N

d)

9.8 N

22.

What is the amount of force required to accelerate a 10 kg object at 20 m/s^2? Only type a number.

(a)  

23.

A soccer ball is sitting in the middle of a field. The ball will remain at rest until an outside force like a players foot or the wind acts upon it. Which of Newton's laws is represented by this?

a)

1st

b)

2nd

c)

3rd

24.

Think about pushing a shopping cart and a car. If you apply the same amount of force to both, the shopping cart will travel fast, but the car will hardly move. To move the car yo would need a larger force. Which of Newton's laws is being represented?

a)

1st

b)

2nd

c)

3rd

25.

Sally jumps on her trampoline. She exerts a force on the trampoline and the trampoline exerts an equal but opposite force back on Sally. This represents

a)

Law 1

b)

Law 3

c)

Law 2

26.

What Newtons law does this picture represent

a)

Newtons 1st law

b)

Newtons 2nd law

c)

Newtons 3rdt law

d)

Newtons 4rth law

27.

Which law explains that it would take more force to push the car than the lawnmower?

a)

1st

b)

2nd

c)

3rd

28.

There is a skateboard rolling and then Billy steps on it and it stops. What Law of motion is this?

a)

3rd

b)

2nd

c)

1st

29.

When you are running. your foot exerts force on the ground and the ground exerts force back onto you. Which of Newton's laws is represented

a)

1st

b)

2nd

c)

3rd

30.

If we put the same force on a bowling ball and a soccer ball, the soccer ball will move faster! Which law explains this?

a)

1st

b)

2nd

c)

3rd

31.

Which way would a swimmer push to move forward in the water?

a)

To the left

b)

Forward

c)

Backward

32.

The reason a ball bounces up when it hits the ground:

a)

The ball and ground repel each other.

b)

The ball exerts a force on the ground, and the ground exerts a force on the ball.

33.

Observe what happens to the motion of the penny. Which of Newton's Laws does this represent?

a)

Newton's 1st Law, inertia

b)

Newton's 2nd Law, Force = m x a

c)

Newton's 3rd Law, action/reaction

34.

Watch as Blake pushes the 2 cars of different masses with about the same force. Observe what happens. Which of Newton's Laws does this represent?

a)

Newton's 1st Law, inertia

b)

Newton's 2nd Law, Force = m x a

c)

Newton's 3rd Law, action/reaction

35.

Watch as I propel the washers across the desk. Observe what happens as I use different amounts of force.

a)

Newton's 1st Law, inertia

b)

Newton's 2nd Law, Force = m x a

c)

Newton's 3rd Law, action/reaction

36.

Watch as I send the car down the track. What happens as I increase the force that I am using? Which of Newton's Laws does this represent?

a)

Newton's 1st Law, inertia

b)

Newton's 2nd Law, Force = m x a

c)

Newton's 3rd Law, action/reaction

37.

Watch as Blake begins to run. What happens to the sheets of paper under his feet? Why? Which of Newton's Laws does this represent?

a)

Newton's 1st Law, inertia

b)

Newton's 2nd Law, Force = m x a

c)

Newton's 3rd Law, action/reaction

38.

Observe the motion of the washer as I quickly pull the card out from under it. What happened to the washer? Why? Which of Newton's Laws does this represent?

a)

Newton's 1st Law, inertia

b)

Newton's 2nd Law, Force = m x a

c)

Newton's 3rd Law, action/reaction

39.

Which of Newton’s Laws explains a rocket’s movement during launch?

a)

Newton's First Law of Motion

b)

Newton's Second Law of Motion

c)

Newton's Third Law of Motion

d)

Newton's Fourth Law of Motion

40.

When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

a)

Balanced

b)

Magnetic

c)

Spring

d)

Unbalanced

41.

What Unit do we Measure Force in?

a)

Newtons

b)

Joules

c)

Force

d)

Kilograms

42.

Newton's third law states that any action will have a(n) _______ and ______ reaction

a)

Equal and similar

b)

Equal and opposite

c)

Equal and different

d)

Greater and opposite

43.
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
44.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
45.
Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?
a)
car
b)
bike
c)
they are equal
d)
cannot determine using the info provided
46.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
47.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
48.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
49.
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
50.
What is the unit for momentum?
a)
m/sec
b)
kg/sec
c)
kg/m
d)
kg m/sec
51.
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
52.
A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 
a)
5 m/s
b)
2.5 m/s
c)
10 m/s
d)
7.5 m/s
53.
A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. At what speed will the second boxcar move?
a)
18.6 m/s
b)
9.3 m/s
c)
7.5 m/s
d)
1.86 m/s
54.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
55.
Determine the momentum of 1000-kg car moving northward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s
d)
20000 kg * m/s north
56.
A 0.250 kg cart moving at 0.400 m/s has how much momentum?
a)
0.1 kg-m/s
b)
1 kg-m/s
c)
10 kg-m/s
d)
100 kg-m/s
57.
A person on a stationary skateboard throws a bowling ball with a velocity of 5.0 m/s. What is a possible speed of the person after the throw? 
a)
0 m/s
b)
1.5 m/s
c)
5.0  m/s
d)
7.5 m/s
58.
Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:
a)
2 m/s 
b)
3.4 m/s 
c)
4.6 m/s 
d)
7.1 m/s
59.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
60.
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.
61.

A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's momentum?

a)

45 kg m/s

b)

72 kg m/s

c)

32.4 kg m/s

d)

0.45 kg m/s

62.
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.
a)
0.5 m/s
b)
1.0 m/s
c)
0.33 m/s
d)
0.67 m/s
63.
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
a)
2 m/s
b)
8 m/s
c)
-2 m/s
d)
1.5 m/s

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