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Newton's Laws

Total questions: 50

Worksheet time: 55mins

Name
Class
Date
1.
Safety belts protect people in cars in the event of an accident because, according to Newton’s Laws of Motion, when an impact causes the car to suddenly change its motion, -
a)
the people in the car will continue to move in the same direction and at the same speed as before the impact.
b)
the speed of the car always increases, giving it greater force since the mass will remain the same.
c)
the speed of the people always increases, since now they have, not one, but two forces acting on them.
d)
the car now has a greater overall mass - its own mass plus the mass of the object by which it has been struck.
2.
A ball thrown into the air starts out with an initial upward velocity, but eventually slows and stops before falling back to the ground. Which of the following contributes the most to the change in motion of the ball?
a)
The initial force with which the ball is thrown
b)
The downward force of gravity
c)
The resistance against the atmosphere
d)
The increase of inertia
3.
According to Newton’s Law of Inertia, an object that is moving will change its motion only if what kinds of forces act on it?
a)
Constant forces
b)
Unbalanced forces
c)
Unbalanced forcesStrong forces
d)
Gravitational forces
4.
What is the unit to MEASURE force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
5.
What is Newtons 3nd law of motion?
a)
An object will stay in motion until something acts on it
b)
For every action there is an equal and opposite reaction
c)
F=MxA
6.
What is Newton's 1st law of motion?
a)
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force
b)
F=MxA
c)
For every action there is an equal and opposite reaction
7.
F=MA
An object of mass 10 kg is accelerated upward at 2 m/s2.  What force is required? 
a)
20 N
b)
2 N
c)
5 N
d)
0 N
8.
Why is person B having a hard time moving down the hill?
a)
Person B has more friction than person A.
b)
Person B has the same friction as person A.
c)
Person B is out of shape.
d)
Person B has less friction has person A.
9.

When an unbalanced force acts on an object, the force ______________________.

a)

changes the motion of the object

b)

is cancelled by another force

c)

does not change the motion of an object

d)

is equal to the weight of the object

10.
a)
1st
b)
2nd
c)
3rd
11.
If these teams 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.
12.
A skater pushes another skater forward, but the one pushing moves backwards.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
13.
The harder you hit a baseball, the faster it accelerates.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
14.
You are carrying a lunch tray when you bump into the edge of a table.  Although the tray did not tip, your milk falls off of the front of the tray.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
15.
What law is best described by inertia?
a)
1st
b)
2nd
c)
3rd
16.
Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more mass.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
17.
A soccer ball accelerates more than a bowling ball when thrown with the same force.
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
18.
This person bought coffee and put it on the seat next to them. If they stopped quickly and the coffee spilled which law would that represent?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
19.
In the picture, the vehicle will move because of...
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 9th Law
20.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N 
b)
40N 
c)
10N 
d)
70N
21.
A person is pushed forward into their seatbelt when a car stops
a)
1st
b)
 2nd
c)
2 and 3
d)
3rd 
22.
How does Newton’s third law explain how a rocket takes off?
a)
The rocket’s acceleration is positive, while the gasses acceleration is negative but the direction is the same. 
b)
The rocket is at rest until ignition.
c)
The hot gasses move in one direction, while the rocket moves in the opposite direction but with equal force.
23.

The diagram below shows two different forces acting on a cyclist riding a bicycle. The total mass of the cyclist and the bicycle is 100.0 kg. Based on this information, what is the acceleration of the cyclist?

a)

0.66 m/s2 backward, because the force of the air slows the cyclist down

b)

0.66 m/s2 forward, because the applied force is greater than the force of the air

c)

2.3 m/s2 backward, because the forces are opposite and not equal

d)

2.3 m/s2 forward, because the cyclist's inertia is greater than the force of the air.

24.
Are forces balanced or unbalanced when a marble rolls down a ramp?
a)
Balanced
b)
Unbalanced
25.
Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?
a)
The car with the smaller mass will require less forces to stop than the car with the larger mass.
b)
The car with the larger mass will amintain its velocity while traveling down the hill.
c)
The car with the smaller mass will take longer to stop than the car with the larger mass.
d)
The car with the larger mass will have less inertia than the car with the smaller mass.
26.

Four boxes are sliding with constant speed before each box experiences and unbalanced force of 8 N. Which box would experience the greatest acceleration when the unbalanced force is applied?

a)

the box with a mass of 2 kg

b)

the box with a mass of 4 kg

c)

the box with a mass of 6 kg

d)

the box with a mass of 8 kg

27.
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
28.
A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.
a)
The Law of Inertia
b)
The Law of Acceleration
c)
The Law of Conservation of Momentum
29.
A soccer ball accelerates more than a bowling ball when thrown with the same force.
a)
Law of Inertia
b)
Law of Acceleration
c)
Law of Conservation of Momentum
30.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
31.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
32.
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)
a)
The one with a mass of .78 kg will have the greatest acceleration.
b)
The one with a mass of .52 kg will have the greatest acceleration.
c)
They will both accelerate at the same rate.
33.
Unit of mass
a)
m/s 2
b)
m/s
c)
newtons
d)
kg
34.
When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
a)
The cannon moving forward
b)
The cannonball moving forward
c)
The cannon moving backward
d)
The cannonball moving backward
35.

Which of the following has more inertia?

a)

Bowling ball

b)

Tennis ball

36.

Which of the following has less inertia?

a)

Feather

b)

Hammer

37.

The greater the force that is applied, the _____ the acceleration.

a)

greater

b)

lesser

38.

The less the force that is applied, the _____ the acceleration.

a)

greater

b)

lesser

39.

What equation is used to solve Newton's Second Law problems?

a)

F = ma

b)

M = Fa

c)

A = m / F

d)

F = m / a

40.

Newton's Third Law says that every time there is an action force, there is also a reaction force that is _____ in size and acts in the _____ direction.

a)

equal, opposite

b)

opposite, equal

c)

greater, different

d)

lesser, same

41.

Newton's Third Law says that forces must always occur in _____.

a)

pairs

b)

groups of 20 or more

c)

individual circumstances

d)

friction

42.

What measurement is used to measure force?

a)

Newtons

b)

Kelvin

c)

Kilos

d)

Moles

43.
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
44.

You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is

a)

speeding up.

b)

slowing down.

c)

changing direction.

d)

speeding up and changing direction.

e)

slowing down and changing direction.

45.
You push against a wall and the wall is pushing back on you.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
46.

A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object

a)

100 m/s

b)

4 m/s

c)

25 m/s

47.

The mass of a large car is 1000 kg. How much force would be required to accelerate the car at a rate of 3 m/sec?

a)

3000 N

b)

3 N

c)

1003 N

48.

What is the force on a 1000 kg elevator that is falling freely at 9.8 m/sec2

a)

102.04 n

b)

9,800 n

c)

980 n

d)

103 n

49.
A 50 kg skater pushed by a friend accelerates 5 m/sec2.  How much force did the friend apply?
a)
45 N
b)
15 N 
c)
10 N
d)
250 N
50.
A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2.  What is the mass of the object?
a)
100kg 
b)
1,250kg
c)
50kg
d)
5kg

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