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Motion & Forces Unit Review

Total questions: 53

Worksheet time: 44mins

Name
Class
Date
1.

Which statement is a correct explanation for balanced forces acting on an object?

a)

The speed of the object decreases.

b)

The direction of the object changes.

c)

The speed of the object increases.

d)

The motion of the object stays the same.

2.

What unit of measuremen t do we use for force?

a)

Inches

b)

Meters

c)

Newtons

d)

Seconds

3.

Choose which scenerio best explains the graph.

a)

Aidan ran at a steady pase for 2 hours. He then rested for 30 minutes before he began running again at an accelerated speed.

b)

Aidan ran for 1 hour. He then stopped for a rest for an hour before going back home.

c)

Aidan rested as much as he walked on this trip.

d)

Aidan ran a steady pase for two hours. He then rested for 30 minutes before walking the rest of the trip.

4.

What is the formula to calculate speed?

a)

speed x time

b)

distance x time

c)

distance /time

d)

time/distance

5.

What is the formula to calculate distance?

a)

speed x time

b)

speed/time

c)

speed + time

d)

speed - time

6.

What is the formula to caculate time?

a)

speed/distance

b)

speed x distance

c)

speed - distance

d)

distance/speed

7.

When the Net force is 0, which way will the object move?

a)

to the right

b)

to the left

c)

it will not move in either direction

8.

17. The graph shows how far three runners were at different times of the race. During what part of the race did runner C move the fastest?

a)

0 - 1.5 seconds

b)

3 - 4.5 seconds

c)

6 - 7.5 seconds

d)

12 - 14.5 seconds

9.
All objects in the universe have a gravitational attraction to each other. 
a)
True
b)
False
10.
What is the unit for mass?
a)
m/sec
b)
kg/sec
c)
kg
d)
kg m/sec
11.

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

12.
What keeps the Moon in orbit around Earth?
a)
Earth's rotation.
b)
Earth's atmosphere.
c)
Earth's gravity.
d)
Earth's shape.
13.

What two things does gravity depend on?

a)

Mass and weight

b)

Weight and distance

c)

Mass and force

d)

Mass and distance

14.
Something that is not moving stays still, and something moving continues going until another force affects it.
a)
Inertia
b)
Velocity
c)
Acceleration
d)
Motion
15.
Forces that are equal in size but opposite in direction.
a)
Balanced force
b)
Unbalanced force
c)
Potential Energy
d)
Friction
16.
When two forces acting on an object are not equal in size.
a)
Balanced Force
b)
Friction
c)
Velocity
d)
Unbalanced Force
17.

Under what condition will a bowling ball slow down if it is rolling down a bowling lane at a constant speed?

a)

An accelerating force is applied to the ball.

b)

An unbalanced external force is applied to the ball.

c)

The mass of the ball is reduced.

d)

The direction of the ball is changed.

18.

In what has become an all too regular occurrence, another elephant has been seen chasing a mouse. The mouse can run much faster than the elephant and the elephant is much more massive than the mouse. Why can the mouse change directions quicker than the elephant?

a)

Because the mouse has a greater speed.

b)

Because the mouse has less mass.

c)

Because the elephant has a smaller speed.

d)

Because the elephant has less mass.

19.
When you slide a box across the floor what force must your push be stronger than?
a)
a. support force
b)
b. friction force
c)
c. gravity
d)
d. air resistance
20.

when an object changes its position compared to a reference point.

a)

acceleration

b)

speed

c)

motion

d)

reference point

21.

total distance traveled divided by total time taken to travel that distance

a)

velocity

b)

motion

c)

acceleration

d)

average speed

22.

the rate at which speed or velocity changes

a)

acceleration

b)

average speed

c)

motion

d)

reference point

23.

Is this a speed or acceleration graph?

a)

speed

b)

acceleration

24.

Is this a speed or acceleration graph?

a)

speed

b)

acceleration

25.

A runner crossed the 1 mile marker of a race running at a speed of 9 miles per hour. She crossed the finish line running at a speed of 9.8 miles per hour. This is an example of...

a)

positive acceleration

b)

negative acceleration

c)

no acceleration

26.
When you know both the speed and direction of an object's motion, you know the
a)
average speed of the object
b)
acceleration of the object
c)
distance the object has traveled
d)
velocity of the object
27.
A train that travels 100 kilometers in 4 hours is traveling at what average speed?
a)
50 km/h
b)
100 km/h
c)
2 km/h
d)
25 km/h
28.
A car accelerates from a standstill to 70 m/s in 10 seconds.  What is the acceleration?
a)
0.7m/s2
b)
7m/s2
c)
14m/s2
d)
none of the above
29.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
30.
Sally experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
31.
Swimming fish experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
32.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
33.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
34.
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
35.

There are _________ types of friction.

a)

2

b)

1

c)

4

d)

5

36.

An object is falling downward through Earth's atmosphere. In which direction is the air resistance force?

a)

Down

b)

Up

c)

Around the object

d)

Through the object

37.

A force which causes objects to fall is

a)

weight

b)

gravity

c)

air resistance

d)

absorbency

38.

Complete the sentence.

It is not the difference in gravity that causes objects to fall at different speeds, it’s the difference in the amount of__________________.

a)

Gravity

b)

Mass

c)

Air resistance

39.

If you jump out of an airplane, which two forces are acting on you?

a)

Gravity and friction

b)

Force and gravity

c)

Gravity and Air Resistance

40.

When you drop a hammer and a feather on the moon what will happen? There is no air on the moon.

a)

They will hit at the same time

b)

The hammer will hit first

c)

The feather will hit first

41.

What is a parachute designed to maximize?

a)

Gravity

b)

Air Pressure

c)

Air Resistance

d)

Thrust

42.

Look at the pictures of the cars. Which car will have the most air resistance force acting upon it? They will be moving at the same speed.

a)
b)
c)
d)

All will have equal air resistance force.

43.
You can think of it as "how much stuff makes up an object"
a)
size
b)
brightness
c)
mass
d)
density
44.

When will the forces of gravity between two objects be the GREATEST?

a)

when the masses of both objects are small and the objects are far apart

b)

when the masses of both objects are large and the objects are close together

c)

when the masses of both objects are small and the objects are close together

d)

when the masses of both objects are large and the objects are far apart

45.

Which statement about gravity is true?

a)

gravity causes objects to pull towards one another

b)

gravity causes objects to push away from each other

c)

gravity only takes place between planets

d)

the moon doesn't have any gravity

46.
Which model has greater gravitational attraction (if any)
a)
Model A
b)
Model B
c)
Both Model A and Model B (same gravity)
47.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
48.
Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
49.
A person not wearing a seatbelt flies through a car window when someone slams on the breaks because the person’s body wants to remain in continuous motion even when the car stops.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
50.
Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more inertia.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
51.
Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
52.
A soccer ball accelerates more than a bowling ball when thrown with the same force.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
53.
A student leaves a pencil on a desk and the pencil stays in the same spot until another student picks it up.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them