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Unit 7 and 8 Test

Total questions: 51

Worksheet time: 1hrs 17mins

Name
Class
Date
1.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

2.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
3.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
4.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

5.

A ____________ is a push or a pull on an object.

a)

friction

b)

force

c)

magnet

d)

gravity

6.
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.
7.
Balanced or unbalanced?
a)
balanced
b)
unbalanced
8.

Forces that have a net force of zero Newtons

a)

Balanced force

b)

Unbalanced force

9.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
10.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
11.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
12.
What is a Force?
a)
The distance
b)
Mass
c)
A push or pull
d)
Give me a  failing grade 
13.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
14.
All objects in the universe have a gravitational attraction to each other. 
a)
True
b)
False
15.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
16.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
17.

If both forces are going in the same direction you should______ those forces

a)

Add

b)

Subtract

c)

Divide

d)

Multiply

18.

What is the unit for FORCE?

a)

N (Newtons)

b)

lbs (pounds)

c)

g (grams)

d)

m/s (meters per second)

19.

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

20.

In the district finals, Vanessa kicks the 0.600 kg soccer ball with a force of 80 N. How much does she accelerate the ball?

a)

122 m/s/s

b)

50 m/s/s

c)

133 m/s/s

d)

48 m/s/s

21.

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

22.

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

23.

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

24.
Force is measured in....
a)

Galileos 

b)

Newtons

c)

Di Vincis

d)

Einsteins 

25.
Inertia is....
a)
for every action, there is an equal and opposite reaction
b)
larger objects take more force to move 
c)
an object in motion tends to stay in motion unless acted on by an opposite force
d)
a push that acts in the opposite direction and it slows down.
26.
What is a force that works AGAINST MOTION?
a)
Force
b)
Motion
c)
Gravity
d)
Friction
27.
Which force produces a change in motion?
a)

unbalanced force

b)

balanced force

c)

gravitational force

d)

frictional force

28.
What pulls a ball back to earth?
a)
Gas
b)
Gravity
c)
Friction
d)
Molecules
29.

If a magician pulls a table cloth from under a table of dishes, what should happen based on Newton's 1st law?

a)

The dishes will stay in place on the table.

b)

The dishes will fall to the ground.

c)

The dishes will accelerate and then slow down.

30.

It is much more difficult to move a dresser full of clothes than an empty dresser. Why?

a)

An object in motion stays in motion.

b)

It takes more force to move an object with more mass.

c)

It takes more friction to move the empty dresser.

31.
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 
32.

The first law of motion says that a moving object tends to keep

a)

force

b)

speed

c)

distance

d)

moving

33.

If there was no friction, objects in motion would stay in motion forever.

a)

true

b)

false

34.

Why is it harder to push a cart full of bricks than a cart full of feathers?

a)

The bricks have more friction than the feathers.

b)

The feathers have more friction than the bricks.

c)

The bricks have more weight/mass than the feathers.

d)

The feathers have more weight/mass than the bricks.

35.
What is the definition of velocity?
a)
A force that opposes motion
b)
Uniform circular motion
c)
The speed of an object in a particular direction
36.
A force is an action exerted on a body in order to change the body's state of ______.
a)
Balance
b)
Being
c)
Proximity
d)
Motion
37.
The force that opposes the motion of two surfaces that are in contact and are sliding over each other.
a)
Static Friction
b)
Kinetic Friction
38.

3 m/s north is an example of a(n)

a)

velocity

b)

time

c)

speed

d)

acceleration

39.

An indicator that orients you when describing motion is called the

a)

speed

b)

time

c)

point of motion

d)

reference point

40.
the tendency of an object to resist a change in its motion
a)
acceleration
b)
inertia
c)
mass
d)
frame of reference
41.

Which has the MOST inertia?

a)
b)
c)
d)
42.

Objects with greater _________ also have greater inertia.

a)

speed

b)

mass

c)

force

d)

friction

43.
Because of inertia, a resting object will remain at ________.
a)
rest
b)
a constant speed
c)
school
d)
inertia 
44.

The acceleration of objects falling on Earth due to gravity is

a)

9.8 m/s

b)

9.8 m/s2

c)

9.8 g/mL

d)

9.8 g/m/m

45.

Define acceleration due to gravity.

a)

The force of gravity acting on an object.

b)

The velocity of an object under the influence of gravity.

c)

The acceleration experienced by an object due to gravity.

d)

The force of gravity.

46.

What is the equation for Force?

a)

velocity x motion

b)

mass x acceleration

c)

kilograms x mass

d)

meters / seconds

47.
Which will cause a moving object to change direction?
a)
Force
b)
Gravity
c)
Inertia
d)
Speed
48.
Why doesn't the moon crash into the Earth?
a)
The moon has more mass, so the Earth orbits around it.
b)
The moon's gravitational force is weak.
c)
Inertia keeps the moon stationary.
d)
The moon has a lot of mass and is farther away.
49.
a)

1

b)

2

c)

3

d)

All of the above

50.

Which law best describes inertia

a)

1

b)

2

c)

3

d)

All of the above

51.
a)

1

b)

2

c)

3

d)

All of the above

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