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Physical Science, Chapter 12, Forces and Motion Post Assessment

Total questions: 36

Worksheet time: 35mins

Name
Class
Date
1.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
2.
How is gravity affected by mass?
a)
the larger the mass of the object, the greater the gravity
b)
small objects have no gravity
c)
gravity is not affected by mass of objects, whether large or small
3.
What is a force that opposes motion between two surfaces?
a)
friction
b)
acceleration
c)
velocity
d)
motion
4.
What is the difference between mass and weight?
a)
mass is how much matter is in an object, and weight is the gravitational pull on that object
b)
mass and weight are the same
c)
weight affects how much mass is in an object
d)
weight is determined by how many atoms make up an object
5.
What slows down the motion of an object or keeps it from starting?
a)
mass
b)
friction
c)
gravity
d)
magnetism
6.
What is motion?
a)
It's like the ocean
b)
Any change in an animal or person's position.
c)
Motion is like acting
d)
Any change in an object or person's position.
7.
What pulls a ball back to earth?
a)
Gas
b)
Gravity
c)
Friction
d)
Molecules
8.
The picture of the position vs. time graph shows an object that is...
a)
accelerating/speeding up
b)
moving at a constant speed 
c)
not moving 
d)
accelerating/slowing down. 
9.
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.
10.
The tendency of an object at rest to stay at rest unless it is acted upon by a force is ___________________
a)
inertia
b)
motion
c)
gravity
d)
lubricant
11.
Why does a crumpled piece of paper land before a flat sheet of paper? 
a)
Gravity exerts more force on the crumpled paper. 
b)
There is more air resistance on the flat paper. 
c)
The crumpled paper is heavier
d)
The flat paper is lighter.
12.
A train that travels 100 kilometers in 4 hours is traveling at what average speed? Remember: Speed= distance/time
a)
50 km/h
b)
100 km/h
c)
400 km/h
d)
25 km/h
13.
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
14.
The combined force of all forces acting on an object is the  ___ force.
a)
net
b)
big
c)
bad
d)
use
15.
When the forces acting upon an object are UNBALANCED , the object will ____
a)
stay still
b)
move
c)
bounce
d)
fly
16.
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
17.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
18.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
19.
What Unit do we Measure Force in? 
a)
Newtons
b)
Joules
c)
Force
d)
Don't know
20.

Which is newtons first law states

a)

An object at rest will remain at rest unless a force is applied

b)

An object is moving

c)

An object has stopped

d)

An moving object will keep going when a force is applied to it

21.

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

a)

equal and same

b)

equal and opposite

c)

equal and equal to

22.

Which of the following is NOT one of the four universal forces?

a)

Electromagnetic

b)

Rotational

c)

Strong nuclear

d)

Gravitational

e)

Weak nuclear

23.

What are the only forces that can both attract and repel?

a)

Magnetic and atomic forces

b)

Electric and atomic forces

c)

Magnetic and static forces

d)

Electric and magnetic forces

24.

Objects with like charges repel one another

a)

True

b)

False

25.

What are the two forces that act within the nucleus to hold it together?

a)

Weak nuclear forces

b)

Nonexistent nuclear forces

c)

Strong nuclear forces

d)

Heavy nuclear forces

26.

What is a center-directed force that continuously changes the direction of an object to make it move in a circle?

a)

Centripetal force

b)

Circular force

c)

Electromagnetic force

d)

Rotational force

27.

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

28.
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
29.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
30.
A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?
a)
74.4 kg
b)
6030 kg
c)
0.0134 kg
d)
80 kg
31.
A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?
a)
8 m/s
b)
32 m/s
c)
0.125 m/s
d)
18 m/s
32.

Free Point: Happy Friday!

a)

Choose

b)

Any

c)

Answer

d)

Free Point

33.

Which type of friction is shown in the picture?

a)

rolling

b)

fluid

c)

static

d)

sliding

34.

Which type of friction is shown in the picture?

a)

rolling

b)

static

c)

fluid

d)

sliding

35.

This photo represents...

a)

Air resistance

b)

water resistance

c)

friction force between 2 solid bodies

36.

_____________ friction acts on objects that are not moving.

a)

sliding

b)

rolling

c)

static

d)

fluid

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