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Unbalanced & Balanced Forces, Friction, Magnetism, Gravity

Total questions: 50

Worksheet time: 26mins

Name
Class
Date
1.

The attractive force that exists between all objects that have mass

a)

Weight

b)

Gravity

c)

Mass

d)

Magnetism

2.
Any object with mass has gravity.
a)
True
b)
False
3.
As distance between two objects increase the pull of gravity 
a)
Increases
b)
Decreases
4.
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
5.

leaves blowing in the wind is an example of a

a)

contact force

b)

noncontact force

6.

a leaf falling from a tree

a)

contact

b)

noncontact

7.

a bat hitting a baseball

a)

contact

b)

noncontact

8.

pushing in a chair

a)

contact

b)

noncontact

9.

All forces have what two things

a)

strength and speed

b)

speed and direction

c)

strength and direction

d)

speed and size

10.

We represent forces by drawing what?

a)

points

b)

arrows

c)

triangles

d)

circles

11.

What does gravity depend on?

a)

mass and weight

b)

speed and distance

c)

distance and direction

d)

mass and distance

12.

The amount of gravity pushing down on an object

a)

force

b)

weight

c)

mass

d)

gravity

13.

How can you reduce friction?

a)

remove a lubricant

b)

add surface area

c)

reduce surface area

d)

rub your hands faster

14.

Friction can occur in the air?

a)

True

b)

False

15.

Friction is a force that can cause objects to slow down or even come to a stop

a)

True

b)

False

16.

the force that opposes motion

a)

mass

b)

weight

c)

friction

d)

speed

17.

Two factors affecting the strength of gravity between 2 objects are...

a)
Mass and Distance 
b)
Mass and Matter
c)
Distance and Weight 
d)
Weight and Mass
18.
The force of gravity acting on an object is the object's ______.
a)
Mass
b)
Matter
c)
Weight 
d)
Terminal velocity 
19.

What is the unit used to measure force? 

a)
Pounds 
b)
Grams 
c)
Newtons 
d)
kg/ m2
20.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N 
b)
40N 
c)
10N 
d)
70N
21.
To calculate net force, when forces are acting in the same direction, the forces are ...
a)
added 
b)
subtracted 
c)
mutiplied 
d)
divided 
22.
Pressing on the breaks when driving is an example of...
a)

friction 

b)

gravity

c)

magnetism

d)

normal force

23.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
24.
A force is...
a)
a push 
b)
a pull 
c)
a push or pull 
d)
a push or pull with a specific magnitude and direction 
25.
Forces that have a net force of zero and the object's movement is not effected.
a)
Balanced Forces 
b)
Unbalanced Forces 
26.
To calculate net force, when forces are acting in opposite directions, the forces are ...
a)
added 
b)
subtracted 
c)
multiplied 
d)
divided 
27.
Does mass differ from weight?
a)
Yes- they are very different!!
b)
No- they can be interchanged 
c)
I am not sure- I have more studying to do before Friday!! 
28.
Imagine you travel to another planets. What will change as you walk around the surface of the planet- your mass or your weight?
a)
Mass
b)
Weight 
c)
Both 
d)
Neither 
29.

On which surface would a ball move slowly?

a)

carpet

b)

marble floor

c)

wooden floor

d)

I don't know

30.

Rough surfaces have

a)

more friction

b)

less friction

c)

same level of friction

d)

I don't know

31.
Without gravity we would________. 
a)
Float away
b)
Stay in the ground
c)
Nothing would happen.
d)
I don't know
32.
Which objects have a STRONG force of gravity?
a)
Objects with GREATER mass, like elephants
b)
Objects with LESS mass, like mice
33.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
34.
Why can astronauts jump and float a little on the Moon?
a)
Because the Moon's gravity is NOT that STRONG.
b)
Because the Moon's gravity is VERY STRONG. 
35.
What is mass?
a)
How much MATTER makes up an object.
b)
How much GRAVITY is pulling an object.
36.

When likes poles of magnets are near each other they _______________.

a)

attract

b)

repel

c)

jump

d)

stick

37.

Magnetic forces are strongest at the ____________.

a)

origin

b)

middle

c)

poles

d)

vertex

38.

The needle of a compass moves because of the Earth's _____________.

a)

friction

b)

gravity

c)

magnetism

d)

force

39.

How can you increase the magnetic field between two bar magnets?

a)

Move them farther apart.

b)

Drop them.

c)

Move them closer together.

d)

Heat them up.

40.

Which of the following materials can be magnetized?

a)

wood

b)

Iron

c)

nickel

d)

cobalt

41.

Which property of magnets is being demonstrated in this image?

a)

Like poles repel.

b)

Opposite poles attract.

c)

Magnetic field lines.

d)

Strongest at the poles.

42.

Which property of magnets is being demonstrated in this image?

a)

North and South Poles.

b)

Magnetic field lines.

c)

Opposites attract.

d)

Like poles repel.

43.

the area around a magnet where magnetic force can be felt

a)

Magnetic Force

b)

Field Lines

c)

Magnetic Field

44.

two like poles (N and N) or (S and S) near each other will push each other apart with a force

a)

true

b)

false

45.

Like poles __________ each other while unlike poles ___________ each other.

a)

attract, repel

b)

repel, attract

c)

oppose, connect

d)

connect, oppose

46.

The area around a magnet is called the .....

a)

attraction zone

b)

work area

c)

magnetic field

d)

hot zone

47.

Magnetic Force is

a)

A force of attraction between any two objects in the universe

b)

A force that acts between objects that are electrically charged

c)

The force of attraction or repulsion between unlike or like poles

d)

A contact force that resist motion between two objects that are touching

48.

Calculate the net force and direction of the object in the image shown.

a)

35N right

b)

35N left

c)

5N left

d)

5N right

49.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

50.

What is the net force and direction of the object?

a)

20 N -left

b)

0 N - not moving

c)

400 N -right

d)

40 N -right

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