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9th physical science

Total questions: 71

Worksheet time: 1hrs 13mins

Name
Class
Date
1.

A crane does 1000 J of work on a beam, accelerating the beam vertically upward. Neglecting, friction, it the gravitational potential energy of the beam increases by 750 J, its kinetic energy

a)

increases by 750 J

b)

decreases by 125 J

c)

increases by 250 J

d)

decreases by 250 J

2.

An egg dropped into a box filled with foam has less chance of breaking than an egg dropped onto a tile floor because

a)

it increases the length of time the force acts on the egg.

b)

is decreases the distance over which the force acts on the egg.

c)

it increases the rate of acceleration of the egg.

d)

it decreases the mass of the egg.

3.

A skydiver with a mass of 70 kg accelerates to Earth at a rate of 9.8 m/s2 due to gravity. What is the force on the skydiver?

a)

79.8 Newtons

b)

7.14 Newtons

c)

0.14 Newtons

d)

686.0 Newtons

4.

The overall force on an object after all the forces are added together is called the

a)

net force.

b)

balanced force.

c)

unbalanced force

d)

centripetal force

5.

Two billiard balls with the same mass of .16 kg are going in opposite directions and collide in an elastic collision. Billiard ball A is moving at 12 m/s and billiard ball B is moving at 10 m/s when they collide. After the collision billiard ball A travels at 10 m/s. What is the velocity of billiard ball B after the collision?

a)

32 m/s

b)

2 m/s

c)

12 m/s

d)

10 m/s

6.

The direction of the net force acting on a object that is moving is in the direction of the

a)

velocity.

b)

acceleration.

c)

mass.

d)

speed.

7.

Forces can be added together only if they are

a)

unaffected by gravity.

b)

balanced forces.

c)

substantial.

d)

acting on the same object.

8.

The law of universal gravitation states that the attraction between any two objects is

a)

directly proportional to the distance between them.

b)

inversely proportional to the square of the distance between them.

c)

inversely proportional to the masses of the objects.

d)

directly proportional to the square of the product of the objects masses.

9.

As a wind up toy's spring is unwound and comes to a stop, the elastic potential energy and kinetic energy are

a)

both converted to thermal energy.

b)

are converted to elastic potential energy.

c)

are converted to gravitational energy

d)

are converted to kinetic energy.

10.

The force of gravity on a person or object on the surface of a planet is called

a)

weight.

b)

mass.

c)

terminal velocity.

d)

free fall.

11.

The greater the mass of an object,

a)

the easier the object starts moving.

b)

the greater its inertia.

c)

the more balanced it is.

d)

the more space it takes up.

12.

What is the kinetic energy of a tennis ball with a mass of .02 kg moving with a velocity of 40 m/s?

a)

32 Joules

b)

1.6 Joules

c)

16 Joules

d)

.4 Joules

13.

What is the gravitational potential energy of a 33 kg rock sitting on a 250 meter cliff?

a)

8,250 J

b)

80,850 J

c)

80,850 N

d)

8,250 N

14.

If a persons distance from the Earth increase by 2 times (twice as far away) happens to the gravitational force?

a)

increase by 4 times

b)

decrease by 4 times

c)

increases by 1/4

d)

decreases by 1/4

15.

What has more kinetic energy, a elephant standing still or a mouse moving at 5 m/s?

a)

the elephant

b)

the mouse

c)

they both have the same amount

d)

not enough information

16.

If a sign is hanging from two chains and is not moving, what is true about the forces acting on the chain?

a)

There are no forces acting on the chain.

b)

The force of gravity is greater than the tension force.

c)

The tension force is greater than the force of gravity.

d)

The tension force and the force of gravity are equal.

17.

Benny pushes Betty on her skateboard with a force of 150 N. If she accelerates at 3.0 m/s^2 what is her mass?

a)

4.5 kg

b)

450 kg

c)

.5 kg

d)

50 kg

18.

How much force is needed to accelerate a 66 kg skier at 2 m/sec2

a)

33 N

b)

132 J

c)

132 N

d)

.132 N

19.

When a car is on cruise control on the highway, traveling at a constant speed

a)

the forces acting on the car are balanced.

b)

the forces acting on the car are unbalanced.

c)

the frictional force is greater than the applied force.

d)

the applied force is greater than the frictional force.

20.

If mass increases and the force remains constant the acceleration

a)

increases.

b)

decreases.

c)

does not change.

21.
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
22.
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 
23.
Newton's third law states that any action will have a(n) _______ and ______ reaction
a)
Equal and similar
b)
Equal and opposite
c)
Equal and different
d)
Greater and opposite
24.
This equation goes with which law?
a)
Newton's first law of motion
b)
Newton's second law of motion
c)
Newton's third law of motion
d)
None of these
25.
Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?
a)
first
b)
second
c)
third 
d)
fourth
26.
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 
27.
When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
a)
The cannon moving forward
b)
The cannonball moving forward
c)
The cannon moving backward
d)
The cannonball moving backward
28.
A bike accelerates at 10 m/s2 when a force of 50N is applied.  What is the mass of the bike and its rider?
a)
25 kg
b)
200 kg
c)
20 kg
d)
5 kg
29.
Which of Newton's laws are illustrated with a rocket launch?
a)
1st Law, the Law of Inertia. 
b)
2nd Law, the Law of Acceleration.
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
30.
Which of Newton's Laws is illustrated with a large mass and a small mass accelerating?
a)
1st Law, the Law of Inertia.
b)
2nd Law, the Law of Acceleration
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
31.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
32.
A car speeding up, a dog slowing down and person turning around the block are examples of..
a)
Balanced Forces
b)
Unbalanced Forces
33.
A cat sitting on couch, a pencil on desk and a car at rest are all example of..
a)
Balanced Force
b)
Unbalanced Force
34.
If net force acting on object is 0, then the force is considered to be..
a)
Balanced
b)
Unbalanced
c)
Equal in Direction
d)
Distance/Time
35.
A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 
a)
18N left
b)
18N right
c)
2N right
d)
2N left
36.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
37.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
38.
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)
a)
The one with a mass of .78 kg will have the greatest acceleration.
b)
The one with a mass of .52 kg will have the greatest acceleration.
c)
They will both accelerate at the same rate.
39.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
40.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
41.

Which of the following is a vector quantity?

a)

Work

b)

Speed

c)

Velocity

d)

Force

e)

Accelaration

42.
A force of 100 newtons was necessary to lift a rock.  A total of 150 joules of work was done.  How far was the rock lifted?
a)
1.5m
b)
15,000 m
43.
It took 50 joules to push a chair 5 meters across the floor. With what force wast the chair pushed?
a)
250N
b)
10N
44.
A force of 15 newtons is used to push a box along the floor a distance of 3 meters.  How much work was done?
a)
3 J
b)
45 J
45.
units of force are
a)
netwons
b)
grams
c)
joules
d)
meters
46.
 Work done = Force x blank?
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
47.
if you push a cart with a force of 60 N resulting in 120 J of work.. how far did you move the cart? 
a)
7200 m
b)
0 m
c)
2 N 
d)
2 m
48.
The unit or label for work is
a)
netwons
b)
joules
c)
meters
d)
seconds
49.
You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?
a)
54 N
b)
6.0 J
c)
54 J
d)
27 J
50.
Two factors that determine work are
a)
amount of the force, and effort used
b)
amount of the force, and type of force
c)
mass, and distance
d)
amount of force and distance moved
51.
It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box ?
a)
200 J
b)
20.0J
c)
2 J
d)
200 N
52.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
53.
Which of Newton's Laws is illustrated with a large mass and a small mass accelerating?
a)
1st Law, the Law of Inertia.
b)
2nd Law, the Law of Acceleration
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
54.
Which of Newton's laws are illustrated with a rocket launch?
a)
1st Law, the Law of Inertia. 
b)
2nd Law, the Law of Acceleration.
c)
3rd Law, the Law of Action Reaction
d)
The Law of Conservation of Mass
55.
A bike accelerates at 10 m/s2 when a force of 50N is applied.  What is the mass of the bike and its rider?
a)
25 kg
b)
200 kg
c)
20 kg
d)
5 kg
56.
When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
a)
The cannon moving forward
b)
The cannonball moving forward
c)
The cannon moving backward
d)
The cannonball moving backward
57.
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 
58.
Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?
a)
first
b)
second
c)
third 
d)
fourth
59.
This equation goes with which law?
a)
Newton's first law of motion
b)
Newton's second law of motion
c)
Newton's third law of motion
d)
None of these
60.
Newton's third law states that any action will have a(n) _______ and ______ reaction
a)
Equal and similar
b)
Equal and opposite
c)
Equal and different
d)
Greater and opposite
61.
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 
62.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
63.
A car speeding up, a dog slowing down and person turning around the block are examples of..
a)
Balanced Forces
b)
Unbalanced Forces
64.
A cat sitting on couch, a pencil on desk and a car at rest are all example of..
a)
Balanced Force
b)
Unbalanced Force
65.
If net force acting on object is 0, then the force is considered to be..
a)
Balanced
b)
Unbalanced
c)
Equal in Direction
d)
Distance/Time
66.
A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 
a)
18N left
b)
18N right
c)
2N right
d)
2N left
67.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
68.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
69.
If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)
a)
The one with a mass of .78 kg will have the greatest acceleration.
b)
The one with a mass of .52 kg will have the greatest acceleration.
c)
They will both accelerate at the same rate.
70.
45 m/s2 is the... 
a)
Mass
b)
Force 
c)
Acceleration
d)
weight
71.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F

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