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Forces

Total questions: 40

Worksheet time: 24mins

Name
Class
Date
1.

forces are measured in

a)

Newtons

b)

m/s

c)

kg

d)

weight

2.

this represents

a)

a push or pull to the left

b)

a push or pull to the right

3.

two forces that are equal in size and opposite in direction

a)

balanced force

b)

unbalanced force

c)

force of gravity

d)

normal force

4.

a balanced force results in a net force of

a)

1 N

b)

4 N

c)

10 N

d)

0 N

5.

a balanced force

a)

will cause a change in acceleration

b)

will not cause a change in acceleration

6.

an unbalanced force results in a net force

a)

equal to zero

b)

not equal to zero

7.

What is the net force of 10 N of force pull to the right, and 3 N of force push to the right:

a)

7 N

b)

10 N

c)

13 N

d)

30 N

8.

What is the net force on an object if 50 N of force push up, and 50 N of force pull down

a)

50 N

b)

100 N

c)

0 N

d)

55 N

9.

A force of 50 N pushes to the right, and a force of 20 N pushes to the left, the object will

a)

accelerate

b)

not accelerate

10.

a _______ force is always a push directed at right angles (perpendicular) to the surface

a)

normal force

b)

applied force

c)

force of gravity

d)

tension force

11.

The force that opposes motion between two objects sliding past each other. (opposite the applied force)

a)

normal force

b)

applied force

c)

force of gravity

d)

force of friction

12.

The force that pulls objects together (a ball falling to the ground)

a)

normal force

b)

applied force

c)

force of gravity

d)

force of friction

13.

this force diagram shows

a)

an object moving to the right

b)

an object at rest

c)

an object falling

d)

an object slowing down

14.

this force diagram shows

a)

an object moving to the right

b)

an object at rest

c)

an object falling

d)

an object slowing down

15.

this force diagram shows (notice the applied force is bigger than the friction force)

a)

an object moving to the right

b)

an object at rest

c)

an object falling

d)

an object slowing down

16.

this force diagrams shows

a)

an object moving to the right

b)

an object at rest

c)

an object hanging from a cord

d)

an object slowing down

17.

Which of the following is a force that can occur over a distance: (without touching)

a)

normal force

b)

applied force

c)

magnetic force

d)

friction

18.

An area of space that surrounds an object allowing a force to be exerted:

a)

mass

b)

weight

c)

force

d)

field

19.

Mass is defined as

a)

The measured of the gravitational force on an object

b)

The amount of matter in an object

20.

the strength of gravity on Earth is

a)

1.6

b)

9.8

c)

3.7

d)

10

21.

Which is the correct unit for weight: HINT: weight is a FORCE

a)

kg

b)

g

c)

W

d)

N

22.

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them. (Think about the penny and the notecard we did in class!)

a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
23.

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 (Law of Inertia)

b)

Newton's 2nd Law (Law of Acceleration)

c)

Newton's 3rd Law (Action/Reaction)

24.

Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more mass and requires more force to accelerate.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

25.

When you step on a Lego, you push on the Lego and the Lego pushes back on you.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

26.

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 (Law of Inertia)

b)

Newton's 2nd Law (Law of Acceleration)

c)

Newton's 3rd Law (action/reaction)

27.

Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.

a)

Newton's 1st Law (Law of Inertia)

b)

Newton's 2nd Law (Law of Acceleration)

c)

Newton's Third Law (action/reaction)

28.

"For every action force, there is an equal and opposite reaction force."

a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
29.
Force = Mass x Acceleration
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
30.
The combination of all the forces acting on an object is the...
a)
net force
b)
action force
c)
reaction force
d)
balance force
31.
An automobile you are riding in suddenly stops, but you continue to go forward.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
32.
You push against a wall and the wall is pushing back on you.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
33.

What is the acceleration of a 50 kg object pushed with a force of 500 newtons?

a)

100 m/s2

b)

25,000 m/s2

c)

10 m/s2

d)

25 m/s2

34.

A cannonball with a mass of 0.5 kg is flying at an acceleration of 10 m/sec/sec. What is its force?

a)

50 Newtons

b)

5 Newtons

c)

20 Newtons

d)

9.5 Newtons

35.
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
36.

A squirrel (on Earth) has a weight of 4.9 N. What is his MASS? Hint: Use the weight equation.

a)

4.9 kg

b)

9.8 N/kg

c)

0.5 kg

d)

5.0 kg

37.

What is the weight of a 0.456 kg object?

a)

answer cannot be determined

b)

0.046 kg

c)

4.46 N

d)

21.5 N

38.

What statement is true?

a)

Mass never changes. Weight does.

b)

Weight never changes. Mass does.

c)

Both mass and weight change because they are affected by gravity.

d)

Neither mass nor weight change. They are always the same.

39.

Find the weight of a 5kg rock on Mercury with a gravitational pull of 3.59m/s/s.

a)

5kg

b)

17.95N

c)

1.39N

d)

0.718N

40.

According to Newton's 3rd law... I hit a baseball with a bat. The bat applies a 50 N force to the ball. The ball applies a _______ N force to the bat.

a)

50

b)

0

c)

100

d)

200