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8th Grade STAAR Force, Motion, & Energy Review

Total questions: 40

Worksheet time: 53mins

Name
Class
Date
1.

What term describes why objects resist changes in their state of motion?

a)

gravity

b)

inertia

c)

force

d)

friction

2.

The force that prevents a ball rolling on the ground from continuing on it's path forever is...

a)

Friction

b)

Gravity

c)

Inertia

3.
A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
4.
An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which of these best explains this situations
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
Conservation of momentum
5.
The combination of all the forces acting on an object is the...
a)
net force
b)
action force
c)
reaction force
d)
balance force
6.
What two measurements are necessary for calculating speed?
a)
Mass and time
b)
Temperature and mass
c)
Mass and distance
d)
Distance and time
7.
What is the speed of an object that travels 60 meters in 4 seconds?
a)
240 m/s
b)
15 m/s
c)
0.067 m/s
d)
15 mph
8.
A force of 90N is applied to each cart below, which one will accelerate the fastest?
a)
Cart 1
b)
Cart 2
c)
Cart 3 
d)
Cart 4
9.
If a 10 kilogram object had a force of 50 newton's applied to it, what would its acceleration be?
a)
15 m/s^2
b)
5 m/s^2
c)
.5 m/s^2
d)
10 m/s^2
10.

An inflated balloon released from rest moves horizontally.

The law that best explains this event is

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

Law of Gravity

11.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
12.

True or False: objects with greater mass require more force to accelerate when compared to objects with less mass.

a)

True

b)

False

13.

Which force causes an object to speed up or slow down (accelerate or decelerate)?

a)
unbalanced force
b)
balanced force
14.

Looking at the image. Decide if this is balanced or unbalanced.

a)

Unbalanced

b)

Balanced

15.
What does this graph represent?
a)
Constant Speed
b)
Acceleration
c)
Not moving
16.

What is happening between 2 and 3 seconds?

a)

The object is not moving.

b)

The object is not accelerating.

c)

The object is slowing down.

d)

The object is speeding up.

17.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
18.

During which segment did the car come to a complete stop?

a)

Segment A to B

b)

Segment B to C

c)

Segment C to D

d)

Segment D to E

19.

During which segment did the car travel the fastest?

a)

Segment A to B

b)

Segment B to C

c)

Segment C to D

d)

Segment D to E

20.

Where would this baseball have the least amount of kinetic energy?

a)

W

b)

X

c)

Y

d)

Z

21.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

22.

When the toaster is used, Electrical Energy is transferred to _____ Energy.

a)

solar and nuclear

b)

mechanical and thermal

c)

Chemical and thermal

d)

electrical and sound

23.

Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?

a)

chemical → light → electrical + thermal

b)

electrical → light → chemical + thermal

c)

light → electrical → chemical + thermal

d)

chemical → electrical → light + thermal

24.

Can you create energy?

a)

Yes

b)

No

25.

What form of energy is stored in food?

a)

light energy

b)

kinetic energy

c)

chemical energy

d)

mechanical energy

26.

Drag and drop the correct letters to fill out the formula triangle to calculate for force.​ ​ ​

a)F
b)m
c)a
1
2
3
1)
2)
3)
27.

The net force acting on the object is acting

a)

to the right

b)

up

c)

down

d)

to the left

28.

The net force acting on the object is (a)   N.

29.

The net force is (a)   N.

30.

Is it balanced?

a)

Yes

b)

No

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.
8 N to the left , and 4 N to the right. Find the net force. Is this balanced?
a)
12 N Right  No
b)
4 N Left  No
c)
12 N Right  Yes
d)
4 N Left  Yes
33.

When a baseball player catches a ball, the ball pushes towards the glove; this is the action force. What is the reaction force?

a)

The reaction force is the glove pushing back on the ball with a stronger force.

b)

The reaction force is the glove pulling back on the ball with an equal force.

c)

The reaction force is the glove pushing back on the ball with an equal force.

d)

The reaction force is the ball pushing away from the glove with an equal force.

34.

Which of the images below demonstrates Newton's 3rd Law of Motion regarding "action/reaction pairs?" (there is more than 1... in other words, you must choose all that apply)

a)

b)

c)

d)

e)

35.
a)

b)

c)

d)

36.
a)

1.4 m/s

b)

0.71 m/s

c)

22.4 m/s

d)

35 m/s

37.
A boat travels at 22 km/hr for 10 hrs, what distance will it travel?
a)
220 miles
b)
2.2 km
c)
220 km
d)
22 km
38.

When does a yo-yo have the most potential energy?

a)

when it is at its highest point

b)

when it is at its lowest point

c)

when it is moving between its highest and lowest point

d)

when it is moving at its top speed

39.

When a pendulum swings, at which point is kinetic energy highest?

a)

1

b)

2

c)

3

d)

4

40.

What type of energy is greatest when the cannonball is at point C?

a)

kinetic energy

b)

potential energy

c)

elastic energy

d)

compressed energy

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