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Forces

Total questions: 45

Worksheet time: 2hrs 18mins

Name
Class
Date
1.

A force is ____.

a)

a push or pull that can cause movement

b)

a magnet

c)

when someone does not work

2.

Gravity is ____.

a)

a force that attracts objects towards each other

b)

a force that moves objects away

c)

a push or pull

3.

Magnetism is _____.

a)

a force that pulls metals towards a magnet

b)

when you look at a magnet

c)

a force that eats magnets

4.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
5.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

6.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
7.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
8.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
9.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
10.
A north pole and a south pole will attract.
a)
True
b)
False
11.
Earth's magnetic field and a bar magnet attract particles to the same locations. Where are they?
a)
The middle
b)
All around the outside
c)
The north and south poles
d)
First to the middle, then to the ends
12.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
13.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
14.
What is the type of circuit that stops working when one bulb goes out?
a)
A broken circuit
b)
Parallel Circuit
c)
Series Circuit
d)
A metal circuit
15.
What is an electromagnet?
a)
a temporary magnet made from current carrying wire around a magnetic metal core.
b)
a permanent magnet with a north and south pole
16.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
17.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
18.

Which law of motion says that you must push or pull objects harder if they have more mass?

a)

1st

b)

2nd

c)

3rd

d)

4th

19.

Letting go of a balloon full of air is demonstrating Newton's ______ _______ ________ _________ because the air comes out of the back and the balloon moves forward.

a)

1st law of motion

b)

2nd law of motion

c)

3rd law of motion

d)

13th law of motion

20.

Which is newtons 3rd law

a)

for every thing there is reaction

b)

for every reaction there is a unusual action

c)

For every reaction there is an equal and opposite reaction

d)

for every reaction there is an good action

21.

Which is newtons first law states

a)

An object at rest will remain at rest unless a force is applied

b)

An object is moving

c)

An object has stopped

d)

An moving object will keep going when a force is applied to it

22.
a)
1st
b)
2nd
c)
3rd
d)
law of motion
23.
What law is best described by inertia?
a)
1st
b)
2nd
c)
3rd
d)
law of conservation of mass
24.
A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.
a)
The Law of Inertia (1st law)
b)
The Law of Acceleration (2nd law)
c)
The Law of Conservation of Momentum
d)
Action Reaction Law (3rd law)
25.
What is the acceleration of an object traveling at a constant velocity?
a)
10 m/s2
b)
0 m/s2
c)
250 m/s2
d)
20 m/s2
26.
What are the appropriate units to describe acceleration?
a)
m/s
b)
m/s2
c)
cm
d)
there are no units associated with acceleration
27.
a)

1

b)

2

c)

3

d)

All of the above

28.

F=MxA

a)

1

b)

2

c)

3

d)

All of the above

29.

What is this graph representing?

a)

Constant Speed

b)

Acceleration (speeding up)

c)

Deceleration (slowing down)

d)

No motion

30.
A car driving at 50 miles per hour drives for 2 hours. What distance did it cover?
a)
50 miles
b)
25 miles
c)
100 miles
d)
75 miles
31.
This graph demonstrates an object that is -
a)
Increasing speed
b)
At a constant speed
c)
Decreasing speed
d)
Stationary
32.
This graph demonstrates an object that is -
a)
Increasing speed
b)
At a constant speed
c)
Decreasing speed
d)
Stationary
33.
This graph demonstrates an object that is -
a)
Increasing speed 
b)
At a constant speed
c)
Decreasing speed 
d)
Stationary
34.
This graph demonstrates an object that is -
a)
Increasing speed toward the start
b)
Moving away from the start at a constant speed
c)
Decreasing speed away from the start
d)
Moving toward the start at a constant speed
35.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
36.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
37.

What amount of force needs to be applied to a 20-kg bowling ball to give it an acceleration of 5 m/s2?

a)

4 N

b)

25 N

c)

100 N

d)

250 N

38.

Gabriel sprinted down the hallway for a science project. He ran a total of 40 meters in 20 seconds. What was his average speed?

a)

2 meters per second

b)

20 meters per second

c)

40 meters per second

d)

10 meters for second

39.
A truck driver drove his truck for 5 miles. She drove that distance in a total of 20 minutes. What was the truck driver's average speed?
a)
4 miles per minute
b)
0.25 miles per minute
c)
5 miles per minute
d)
0.5 miles per minute
40.
A marble rolling at 10 m/s slows to 2 m/s in 16 seconds. What is the acceleration of the marble?
a)
0.5 m/s2
b)
2 m/s2
c)
-0.5 m/s2
d)
-2 m/s2
41.

The acceleration of objects falling on Earth due to gravity is

a)

9.8 m/s

b)

9.8 m/s2

c)

9.8 g/mL

d)

9.8 g/m/m

42.

What is the velocity of an object that has been falling freely in a vacuum for 2 seconds?

a)

9.8 m/s down

b)

10.1 m/s down

c)

19.6 m/s down

d)

39.2 m/s down

43.

If an object is thrown outward and dropped from the same height, they will hit the ground at the same time.

a)

True

b)

False

44.

When a magnet is split in half

a)

Two magnets each having a N and S pole

b)

One magnet has a N and one has a S pole

c)

Both magnets loose their charge when the magnet breaks

45.

Two objects of different masses are dropped from the same height, which is true.

a)

The heavier object will hit the ground first

b)

The lighter object will hit the ground first

c)

They will hit the ground at the same time

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