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PS Chapter 3

Total questions: 70

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

What is the unit for FORCE?

a)

N (Newtons)

b)

lbs (pounds)

c)

g (grams)

d)

m/s (meters per second)

2.

What minimal force must be exerted by a mother to lift her 5kg baby?

a)

0 N

b)

5 N

c)

49 N

d)

10 N

3.

In problem # 3, why would it have been harder just to get the cabinet to move from a standstill?

a)

because the static coefficient of friction is greater than the sliding coefficient of friction.

b)

because the sliding coefficient of friction is greater than the static coefficient of friction.

c)

because Becca is stringer when she is standing still.

d)

because it is easier to push things across wood than it is to push things across carpet.

4.

A 68 kg runner exerts a force of 59 N. What is the acceleration of the runner?

a)

9.8 m/s/s

b)

5 m/s/s

c)

1.968 m/s/s

d)

0.868 m/s/s

5.

A crate is dragged across an ice covered lake. The box accelerates at 0.08 m/s/s and s pulled by a 47 N force. What is the mass of the crate?

a)

587.5 kg

b)

642.8 kg

c)

58.75 kg

d)

98.81 kg

6.

3 women push a stalled car. Each woman pushes with a force of 425 N. What is the mass of the car if it accelerates at 0.85 m/s/s?

a)

2500 kg

b)

1500 kg

c)

900 kg

d)

425 kg

7.

A train has a mass of 18181.81 kg... What is the weight?

a)

178,182 N

b)

1855.29 N

c)

163,636.29 N

d)

161,818.109 N

8.

A small car weighs 10168.25 N, what is its mass?

a)

99648.85 kg

b)

1563.48 kg

c)

998 kg

d)

1037.58 kg

9.
Which will cause a moving object to change direction?
a)
Force
b)
Gravity
c)
Inertia
d)
Speed
10.

as the mass of an object increases, the pull of gravity...

a)

Increases

b)

Decreases

c)

Stays the same

11.

Why do we have a stronger gravitational attraction with Earth than the Sun?

a)

the sun has a larger mass

b)

the Earth has a larger mass

c)

we are closer to center of sun

d)

we are closer to center of Earth

12.
What does the strength of gravity between two objects depend upon?
a)
Mass & distance
b)
Mass & weight
c)
Gravity & inertia
d)
Inertia & mass
13.

The force of gravity (mass x gravity) is also known as...

a)

mass

b)

weight

c)

distance

d)

acceleration

14.

Earth's gravity, 9.8 m/s2, is considered a/an...

a)

force

b)

weight

c)

acceleration

d)

mass

15.
A push or a pull
a)
Inertia
b)
Force
c)
Gravity
d)
Friction
16.
The total of all of the forces acting on an object
a)
Net Force
b)
Inertia
c)
Gravity
d)
Newton
17.
The tendency to resist a change in motion
a)
Net Force
b)
Gravity
c)
Inertia
d)
Balanced Forces
18.
When the net force adds up to zero, the forces ____.
a)
unbalanced
b)
balanced
19.
When the net force does not add up to zero, the forces are ____
a)
balanced
b)
unbalanced
20.
Constant velocity results from forces that are ____
a)
balanced
b)
unbalanced
21.
The force that results from contact between any two objects
a)
Friction
b)
Gravity
c)
Inertia
d)
Net Force
22.
Motion is always opposed by this force
a)
Gravity
b)
Inertia
c)
Friction
d)
Net Force
23.
SI unit of force
a)
kilogram, kg
b)
m/s/s
c)
kelvin, K
d)
newton, N
24.
Unbalanced forces result in ____
a)
motion
b)
constant velocity
c)
acceleration
d)
inertia
25.
Balanced forces a net force of ____
a)
zero N
b)
inertia
c)
100 N
d)
1 N
26.
The three laws of motion were written by ____
a)
Newton
b)
Einstein
27.
The amount of inertia an object has depends on the object's ____
a)
Mass
b)
Size
c)
Speed
d)
Shape
28.
The relationship between force, mass, and acceleration is explained in Newton's ____ Law of Motion.
a)
1st
b)
2nd
c)
3rd
d)
4th
29.
F = mass x ____
a)
force
b)
velocity
c)
acceleration
30.
Newton's 2nd Law of Motion gives us the formula, ____
a)
F = mv
b)
F = ma
c)
F = dt
d)
F = vt
31.
Which of the following isn't a force?
a)
Pull 
b)
Push
c)
Upthrust
d)
Fire
32.
What force slows down something with a parachute?
a)
Fire resistance
b)
Water resistance
c)
Air resistance
d)
Mud resistance
33.
Is this a balanced or unbalance force?
a)
Balanced
b)
Unbalanced
c)
Neither one
d)
Both
34.
Which direction will the object move?
a)
Up
b)
Down
c)
Right
d)
Left
35.
If a 10 kilogram object accelerates suddenly at 15 m/s^2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
36.

If an object is pushed with a force of 20N and moves with an acceleration of 2.0 m/s^2, what is the object's mass?

a)

10 kg

b)

40 kg

c)

20 kg

d)

0.1 kg

37.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
d)
less friction doesn't affect speed
38.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
39.
A type of friction that occurs when air pushes against a moving object causing it to decelerate.
a)
surface area
b)
air resistance
c)
velocity
d)
gravity 
40.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
41.
The amount of friction depends on the weight of the objects pressing together.
a)
True
b)
False
42.
What type of friction is not moving?
a)
static
b)
sliding
c)
fluid
d)
rolling
43.
Which of the following is an example of friction that is harmful?
a)
Pencil marking on paper
b)
Engine parts wearing out
c)
sand placed on ice in the winter
d)
Using an eraser to erase marks
44.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
45.
 What is the unit called that measures force?
a)
weight
b)
meter
c)
Newton
d)
kilogram
46.

The amount of sliding friction depends on which things?

a)

acceleration

b)

type of surface

c)

weight of the moving object

d)

the rotundness of the man on the pogo stick

47.

The weight of an object varies with the:

a)

pull of gravity

b)

dimensions of the object

c)

volume of the object

48.

A red 2008 Dodge Ram 1500 driving north bound on I-35 en route home from Kearney Junior High in Kearney Missouri on a warm Wednesday in March in the year 2019 is an example of what type of friction?

a)

emotional

b)

fluid

c)

rolling

d)

sliding

49.

What is sliding friction?

a)

friction between two surfaces that aren't moving relatively to each other

b)

friction between a rolling object and the surface that it is rolling on

c)

friction where an object rubs against another surface

d)

friction of something going through any type of liquid or air

50.

How could you reduce sliding friction?

a)

add wheels to the object

b)

add bacon grease to the object

c)

add glue to the object

d)

add motor oil to the object

e)

add bearings to the object

51.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
52.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
53.
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.
54.
For every action, there is an equal and opposite reaction.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
55.
a)
1st
b)
2nd
c)
3rd
56.
If an object is stationary (not moving) the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
57.

A squirrel sits on the ground and eats a donut. We know the forces on him must be balanced because...

a)

Forces are always balanced

b)

the squirrel is not accelerating

c)

squirrels are projectiles

d)

he's eating a donut

58.
A car speeding up, a dog slowing down and person turning around the block are examples of..
a)
Balanced Forces
b)
Unbalanced Forces
59.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
60.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion. 
d)
Friction 
61.
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
62.

A person is pushed forward into their seat belt when a car stops. Which law is this?

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

63.
Which of Newton's laws are illustrated with a rocket launch?
a)
1st Law, the Law of Inertia. 
b)
2nd Law, the Law of Acceleration.
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
64.

The harder you hit a baseball, the faster it accelerates.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

65.

You push against a wall and the wall is pushing back on you.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

66.

Which law best explains why more force must be applied to the bowling ball to make it accelerate at the same rate as the tennis ball.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

67.
Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 
a)
feathers 
b)
iron
c)
same
d)
depends on their friction
68.

A sports car speeds up much faster than a dump truck when a traffic light turns from red to green. Which law is this?

a)

Law 1

b)

Law 2

c)

Law 3

69.

Which of the following has more inertia?

a)

Bowling ball

b)

Tennis ball

70.

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

a)

pairs

b)

groups of 20 or more

c)

individual circumstances

d)

friction

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