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Unit 3 Review - Forces and Newton's Laws

Total questions: 34

Worksheet time: 2hrs 42mins

Name
Class
Date
1.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
2.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
3.
The sum of all forces acting on an object and direction
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
4.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
5.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
6.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
7.

A downward-moving skydiver who has just opened the parachute is slowing down.

a)
b)
c)
d)
8.
What is the net force
a)
10 N
b)
0 N
c)
25 N
d)
1 N
9.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
10.

Which way is the object accelerating?

a)

It is not or moving at a constant speed

b)

moving to the right

c)

moving to the left

d)

going up

11.
Which way is the box moving?
a)
to the right
b)
to the left
c)
going up
d)
going down
12.

Which direction will the object accelerate?

a)

Right

b)

Left

c)

Up

d)

Down

13.
The tendency of an object to resist a change in its state of motion is called the object's ______.
a)
incline
b)
straight line
c)
friction 
d)
inertia 
14.
Objects with greater _________ also have greater inertia.
a)
speed
b)
mass
c)
temperature
d)
friction
15.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

16.
A change in velocity over time is called ___________.
a)
speed
b)
force
c)
acceleration
d)
direction
17.

What is the force on a 40kg object that's accelerating 10m/s^2

a)

4N

b)

4

c)

400N

d)

40

18.

When force is 20 N, mass is 5 kg, what is acceleration?

a)

25 m/s/s

b)

5 m/s/s

c)

100 m/s/s

d)

4 m/s/s

19.
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
20.

Newton's 2nd law states that an object's mass

a)

increases as it's acceleration increases

b)

decreases as its acceleration decreases

c)

increases as its acceleration decreases

21.

What Unit do we Measure Force in?

a)

Newtons

b)

Joules

c)

Force

d)

Kilograms

22.
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 
23.

Which of these best states Newton's Second Law?

a)

The greater the mass of an object the greater the force needed to change its motion.

b)

The greater the mass of an object the less force needed to change its motion.

c)

The mass of an object does not effect the force needed to change its motion

24.

Will it take more force to push an empty shopping cart or a shopping cart that is full?

a)

The empty shopping cart

b)

The full shopping cart

c)

They will take the same amount of force

d)

Depends on what is in the full shopping cart

25.

Newton's Second Law can be expressed as

a)

v = d / t

b)

E = mc2

c)

F = ma

d)

m1v1 = m2v2

26.
An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...
a)
Air resistance against the bow
b)
the arrow's push against the bowstring
c)
the grip of the archer's hand on the bow
27.
A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...
a)
Less than 1, 000 N
b)
1,000 N
c)
More than 1,000 N
28.

When a heavy football player and a light one run into each other, who exerts more force? (pushes harder)

a)

The light one

b)

They exert the same force on each other

c)

The heavy one

29.
Newton's Third Law States...
a)
Objects in motion stay in motion and objects at rest stay at rest
b)
Force is equal to mass times acceleration
c)
For each action there is an equal and opposite reaction
30.

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.

31.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
32.
Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?
a)
car
b)
bike
c)
they are equal
d)
cannot determine using the info provided
33.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
34.

The Law of Conservation of Momentum states:

a)

The total momentum before a collision is equal to the total momentum after a collision.

b)

The total momentum before a collision is greater than the total momentum after a collision.

c)

The total momentum before a collision is less than the total momentum after a collision.

d)

The total momentum before a collision is not related to the total momentum after a collision.

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