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SCIENCE8:1ST-PERIODIC-EXAM

Total questions: 60

Worksheet time: 55mins

Name
Class
Date
1.
What is the unit of measurement for force?
a)
kilograms
b)
newtons
c)
grams
d)
newt
2.
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
3.

What is inertia?

a)

the force that opposes motion

b)

the force of attraction between 2 objects

c)

an object's tendency to stay in its state of motion

d)

a change in an object's speed and/or direction

4.
According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
a)
remain in motion.
b)
eventually come to a stop.
c)
change its momentum.
d)
accelerate.
5.

What is the net force on an object?

a)

the sum of all the forces on an object

b)

the negative forces on an object

c)

the positive forces on an object

d)

the balanced forces on an object

6.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
7.
The law of inertia (Newton’s First Law) applies
a)
to both moving and nonmoving objects
b)
only to moving objects
c)
only to objects that are not moving
8.

Why does an 18-wheeler truck have more inertia than a bicycle?

a)

it has more mass

b)

it has more volume

c)

it is not as aerodynamic

d)

It has more space

9.

When two equal forces act in opposite directions on an object, they are called ______________________.

a)

frictional forces

b)

balanced forces

c)

centripetal force

d)

gravitational force

10.
The ______of an object tends to make the object resist being set into motion.
a)
mass
b)
force
c)
motion
d)
unbalanced forces 
11.

Which of the following is the best example of Newton's First Law of Motion?

a)

Jessica's body flies forward after she hits the brakes

b)

Jessica drives a car

c)

Jessica is at a road crossing

d)

Jessica is sleeping

12.

Because of inertia, a resting object will remain at ______.

a)

a. rest

b)

b. school

c)

c. a constant speed

d)

d. inertia

13.

Objects with greater ________ also have greater inertia.

a)

a. speed

b)

b. temperature

c)

c. mass

d)

d. friction

14.

You push on a car and it does not move. What is true about the inertia?

a)

a. The inertia is changing

b)

b. The inertia of the person is equal to the car

c)

c. The inertia of the car is too great

d)

d. There is not inertia because of no movement

15.

Which of these is an example of inertia?

a)

a. a person flying through the windshield during a car wreck because they weren't wearing their seat belt

b)

b. earth constantly traveling at the same speed in it's orbit

c)

c. a person staying in the vehicle and hitting the air bag during a car wreck because they are wearing a seat belt

d)

d. All of the above

16.

Friction is a force that acts ____________.

a)

a. in the same direction as the force

b)

b. perpendicular to the force

c)

c. in the opposite direction of the force

d)

d. upwards only

17.
True of False?
An object's inertia is effected by its mass.
a)
False
b)
True
18.
Measure of how fast an object is going.
a)
frame of reference
b)
speed
c)
force
d)
displacement
19.
The SI unit for force
a)
distance
b)
Newton (N)
c)
frame of reference
d)
inertia
20.

As the mass of an object increases, what happens to the acceleration of the object?

a)

increases

b)

decreases

c)

remains the same

d)

none of these

21.

The stronger the force, the ________ the acceleration.

a)

greater

b)

lesser

c)

Both

22.

According to Newton's second Law, which would take more force to slow down?

a)

The silver car

b)

The green car

c)

They would both take the same force

23.

Which of these best states Newton's Second Law?

a)

The greater the mass of an object the greater the force needed to change its motion.

b)

The greater the mass of an object the less force needed to change its motion.

c)

The mass of an object does not effect the force needed to change its motion

24.
An object with a mass of 5.0 kg accelerates 8.0 m/s2 when an unknown force is applied to it. What is the amount of the force?
a)
40 N
b)
4 N
c)
10 N
d)
0.1 N
25.

An object accelerates 2 m/s2 when a force of 12 newtons is applied to it. What is the mass of the object?

a)

24 kg

b)

20 kg

c)

5 kg

d)

6 kg

26.

An object with a mass of 5 kg has a force of 40 newtons applied to it. What is the resulting acceleration of the object?

a)

2 m/s2

b)

8 m/s2

c)

0.5 m/s2

d)

6 m/s2

27.
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 law best explains this situation?
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
Conservation of momentum
28.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
speed
c)
balanced forces
d)
unbalanced forces
29.
A negative acceleration means that your object is _____. 
a)
Going to Wal-mart 
b)
running for president 
c)
speeding up 
d)
slowing down 
30.
If a 10 kilogram object accelerates suddenly at 15 m/s2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
31.
As the acceleration of an object increases, what happens to the force of the object? 
a)
force increases
b)
force decreases
c)
force remain the same
d)
mass increases
32.

The rate at which an objects velocity changes is called what?

a)

inertia

b)

actualization

c)

acceleration

d)

completion

33.
How much force is needed to accelerate a 3kg skateboard at 5m/s2. 
a)
8N
b)
1.6N
c)
0.6N
d)
15N
34.
For an object to remain at rest, which of the following must be true? 
a)
The forces on it are balanced
b)
There is no friction
c)
Gravity does not act on it
d)
The object has no mass
35.

According to Newton's second law, which would go further, a ball with a mass of ten grams or a ball with a mass of 14 grams?

a)

10 grams

b)

14 grams

c)

They would go the same distance

36.
If you push a basketball and a bowling ball with the same amount of force, which one will accelerate more?
a)
Basketball
b)
Bowling ball
c)
They will accelerate at the same rate
37.

Your neighbor is riding her bike around the block. When she slows down and turns a corner, which changes about her?

a)

her velocity

b)

her friction

c)

her speed only

d)

her balance

38.
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 law best explains this situation?
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
Conservation of momentum
39.
Acceleration is a change in ________. 
a)
direction 
b)
speed 
c)
velocity 
d)
distance 
40.
A greater applied force is required to move an object with a greater mass than one with a smaller mass.
a)
True
b)
False
41.
If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the ground first?
a)
the cannonball
b)
the baseball
c)
The balls land at the same time.
d)
the ball with the larger volume
42.
A crumpled piece of paper hits the ground before a flat sheet of paper because
a)
the acceleration of gravity is greater on the  crumpled paper.
b)
there is more air resistance against the flat paper.
c)
the crumpled paper is more massive
d)
the crumpled paper is less massive.
43.
A hiker’s velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration?
a)
His direction changed.
b)
His direction was unchanged.
c)
His speed increased.
d)
His speed decreased.
44.
How does Newton’s third law explain how a rocket takes off?
a)
The rocket’s acceleration is positive, while the gasses acceleration is negative but the direction is the same. 
b)
The rocket is at rest until ignition.
c)
The hot gasses move in one direction, while the rocket moves in the opposite direction but with equal force.
45.
A person is pushed forward into their seat belt when a car stops.  Which law is this?
a)
1st
b)
 2nd
c)
2 and 3
d)
3rd 
46.

Complete the law:


For every action, there is an ____________ reaction.

a)

equal and opposite

b)

equal

c)

opposite

d)

bigger and better

47.

Complete the statement:


When an object is pushed, it __________________ with an equal and opposite force.

a)

always pushes back

b)

pushes back if it has a larger mass

c)

pushes back it if has a smaller mass

d)

will not push back

48.
Newton's Third Law States...
a)
Objects in motion stay in motion and objects at rest stay at rest
b)
Force is equal to mass times acceleration
c)
For each action there is an equal and opposite reaction
49.
An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...
a)
Air resistance against the bow
b)
the arrow's push against the bowstring
c)
the grip of the archer's hand on the bow
50.
A player throws a ball. The action force is the player impact on the ball. The reaction force is...
a)
The force of the ball impact on the player
b)
The force of the grip of the ball
c)
The celebration the player is thinking of
51.
According to Newton's third law forces come in pairs?
a)
True
b)
False
52.

When a bird is flying, their wings are pushing DOWN against the air. In turn, the air pushes __________ against their wings allowing them to fly.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

53.

When a person is skateboarding, their leg is pushing BACKWARD against the ground. In turn, the ground pushes __________ against their foot allowing them to skateboard.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

54.

When a rocket engine burns, hot gas flows DOWNWARD out the bottom of the rocket. In turn, a thrusting force is produced ____________. This allows a rocket to launch or takeoff.

a)

DOWNWARD

b)

UPWARD

c)

BACKWARD

d)

FORWARD

55.

When a jellyfish is swimming, their body is pushing DOWN against the water. In turn, the water pushes __________ against their body allowing them to swim.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

56.

When a flyboarder is flyboarding, the flyboard pushing DOWN against the water. In turn, the water pushes __________ against the flyboard allowing the rider to have fun.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

57.

When a swimmer is swimming, their arms push BACKWARDS against the water. In turn, the water pushes __________ against their arms allowing the swimmer to swim.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

58.

When Kyrie Irving dribbles, he pushes the ball DOWN against the court. In turn, the floor pushes __________ against the ball allowing it to bounce.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

59.

When you are jumping at a trampoline park, you push DOWN against the trampoline. In turn, the trampoline pushes __________ against you allowing you to bounce.

a)

DOWN

b)

UP

c)

FORWARD

d)

BACKWARD

60.

This is a balloon hovercraft. Air pushes DOWNWARD out of the balloon on the surface. The surface pushes air _______________ and this allows the balloon to hover or float.

a)

DOWNWARD

b)

UPWARD

c)

BACKWARD

d)

FORWARD

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