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Forces and Newton's law

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.
What is a force?
a)
an interaction between two objects that alter their motion
b)
a dance move 
c)
a type of fish
d)
a sport
2.
What is a contact force?
a)
force that act on nothing 
b)
a good cheeseburger 
c)
something that helps you see
d)
forces that act through contact of objects
3.
What is Newton's First law?
a)
inertia only exists in a vacuum
b)
inertia does not occur with objects with mass
c)
equalibrium causes acceleration
d)
An object at rest stays at rest and an object in motion stays in motion  unless acted upon by a force
4.
What is Newton's Second Law?
a)
forces do not cause acceleration
b)
mass is not related to acceleration
c)
F=ma
d)
force is not related to mass
5.
What is Newton's Third law?
a)
an eye for an eye
b)
every action has an equal and opposite reaction
c)
push forcce
d)
inertia
6.
What is friction?
a)
a dog
b)
a rough surface
c)
force that resists slipping between surfaces
d)
push force
7.
The force of attraction between all matter.
a)
inertia
b)
friction
c)
net force
d)
gravity
8.
When all the forces on an object are equal and opposite, & the net force is zero, that's...
a)
balanced forces
b)
unbalanced forces
c)
terminal velocity
d)
reaction forces
9.
A cannonball with a mass of 0.5 kg is flying at an acceleration of 10 m/sec/sec. What is it's force?
a)
50 Newtons
b)
5 Newtons
c)
20 Newtons
d)
9.5 Newtons
10.
To compare the two pictures would require...
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 11th Law
11.

When an unbalanced force acts on an object, the force ______________________.

a)

changes the motion of the object

b)

is cancelled by another force

c)

does not change the motion of an object

d)

is equal to the weight of the object

12.
What law is best described by inertia?
a)
1st
b)
2nd
c)
3rd
13.

The picture is an example of Newton's...

a)

1st Law

b)

2nd Law

c)

3rd Law

14.
Only large objects with mass have gravity.
a)
True
b)
False
15.
Acceleration is a change in _____
a)
velocity
b)
cars
c)
school
d)
me
16.
The formula for average speed is ______
hint: Miles/hour
a)
Speed = Distance / time 
b)
Speed = Distance X time
c)
Speed = ??? 
d)
something fast
17.
Which of the following explains the difference between speed and velocity?
a)
One has motion, and the other does not.
b)
One has direction, and the other does not.
c)
One involves time, and the other does not.
d)
One involves acceleration, and the other does not.
18.
A student leaves a pencil on a desk and it stays there until I pick it up. 
a)
1st Law
b)
2nd Law
19.

When gravity pulls a skydiver towards the Earth, the reaction force is...

a)

The skydiver pulling the Earth.

b)

Air resistance

c)

kinetic energy

20.

Action reaction forces never cancel each other out because

a)

They act on different objects.

b)

They act on the same objects

c)

They do not act on objects.

21.

If two people with the same mass collide, they experience the same amount of force.

a)

True

b)

False

22.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
23.
A picture is hanging on a wall and does not move.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
24.
A rocket is sent into space.  When the power dies out, the rocket will just keep floating and moving in space forever (unless an unbalanced force, such as a meteor, runs into it).
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
None of them
25.

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

a)

The cannon moving forward

b)

The cannon moving backwards

c)

The cannonball moving backwards

d)

The cannonball moving forward

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