Forces and Newton's Laws Review

Question 1

A book at rest on your desk will stay at rest unless acted on by an unbalanced force.

Accepted Answer

1st Law

Question 2

The more force you apply, the greater the acceleration if the mass remains constant

Accepted Answer

2nd Law

Question 3

Forces are vectors because they have....

Accepted Answer

direction and magnitude

Question 4

The coefficient of friction depends on...

Accepted Answer

the relative roughness of the two surfaces in contact

Question 5

What is the mass of a basketball that is shot with 12N of force at an acceleration of 4m/s2?

Accepted Answer

3 kg

Question 6

Object speeds up, slows down or changes direction with this kind of force

Accepted Answer

Unbalanced force

Question 7

You paddle backward to make a boat go forward

Accepted Answer

3rd Law

Question 8

Something is about to happen in this picture. Which of the following sums it up best?

Accepted Answer

Inertia

Question 9

Weight is always the same as...

Accepted Answer

the force of gravity

Question 10

Results in a net force

Accepted Answer

Unbalanced force

Question 11

Results in a change in velocity

Accepted Answer

Unbalanced force

Question 12

F=ma

Accepted Answer

2nd Law

Question 13

In science, force is measured in...

Accepted Answer

Newtons

Question 14

Rockets go up when they take off because gases from the engine push down

Accepted Answer

3rd Law

Question 15

A push or a pull

Accepted Answer

force

Question 16

For every action there is an equal and opposite reaction.

Accepted Answer

3rd Law

Question 17

The overall force acting on an object when all forces are combined

Accepted Answer

net force

Question 18

This is the friction related to objects in motion.

Accepted Answer

kinetic friction

Question 19

If you don’t wear your seatbelt you could slam into the windshield of your car.

Accepted Answer

1st Law

Question 20

What law of motion is best represented by this picture?

Accepted Answer

1st and 2nd

Question 21

A force is required to keep an object in motion.

Accepted Answer

False

Question 22

This is the unit on the coefficient of friction.

Accepted Answer

No unit

Question 23

Results in no net force (forces cancel each other out)

Accepted Answer

Balanced force

Question 24

Acceleration decreases as mass increases

Accepted Answer

2nd Law

Question 25

If you push an empty shopping cart with a lot of force it will accelerate very fast

Accepted Answer

2nd Law

Question 26

The “Law of Inertia”

Accepted Answer

1st Law

Question 27

A Cricket player moves his hands back when catching to keep from hurting his hands. Why?

Accepted Answer

He is slowing the acceleration of the ball to lessen force.

Question 28

A boy hits a 5 kg tennis ball at an acceleration of 25 m/s2. What was the net force involved?

Accepted Answer

125 N

Question 29

Inertia is a force the keeps an object from easily changing speed or direction.

Accepted Answer

False, If you pick this false, you'll get an even better score.

Question 30

An object in motion remains in motion unless acted on by an unbalanced force

Accepted Answer

1st Law

Question 31

Object moves at a constant speed with this kind of force

Accepted Answer

Balanced force

Question 32

A lady pushes a buggy with 10kg of groceries with a net force of 20N. Calculate acceleration.

Accepted Answer

2 m/s2

Question 33

Which of the following best sums up what is happening in this picture?

Accepted Answer

Action=Reaction

Forces and Newton's Laws Review

Questions 33

Forces and Newton's Laws Review

Questions 33