Unit 4 Review: Forces and Newton's Laws

Question 1

On the Moon, would your mass or weight be the same as it is on Earth?

Accepted Answer

Mass

Question 2

You ____ applied forces when calculating the net force.

Accepted Answer

add

Question 3

If forces are balanced, the object could be

Accepted Answer

Both

Question 4

The forces of gravity and air resistance must be _____ for the terminal velocity to be reached.

Accepted Answer

balanced

Question 5

You ____ opposing forces (friction) when calculating the net force.

Accepted Answer

subtract

Question 6

Newton's 1st law says that an object in motion remains in motion unless a __force acts on it.

Accepted Answer

Unbalanced

Question 7

The coefficient of friction between your desk & you is 0.78. Together your weight is 340 N. Fs=

Accepted Answer

265.2 N

Question 8

Newton's 1st law is also known as the law of what?

Accepted Answer

inertia

Question 9

The sum of all the forces acting on an object is...

Accepted Answer

Net force

Question 10

Weight and mass are the same value.

Accepted Answer

False

Question 11

When an object does not experience air resistance, all objects will fall at the same velocity.

Accepted Answer

True

Question 12

When pushed with the same force, a larger mass would accelerate faster.

Accepted Answer

False

Question 13

____ is the force that opposes the sliding motion of two surfaces that are touching each other?

Accepted Answer

friction

Question 14

When calculating an object's weight, what are the units?

Accepted Answer

newton

Question 15

What is the SI unit for force?

Accepted Answer

N

Question 16

The equation to calculate an object's weight is

Accepted Answer

Fg = mg

Question 17

Based on the picture, how would you calculate the force of gravity in the x direction?

Accepted Answer

mgsinΘ

Question 18

This picture is an example of which of Newton's laws?

Accepted Answer

1st

Question 19

The gravitational force exerted on an object is the object's

Accepted Answer

weight

Question 20

If forces are unbalanced, the object could be

Accepted Answer

both

Question 21

A blue whale has a mass of 12,200 kg. What is the blue whale's weight?

Accepted Answer

119,560 N

Question 22

Which of the following is NOT a contact force?

Accepted Answer

Gravity

Question 23

What is the normal force acting on an object who weights 23.6 N?

Accepted Answer

23.6 N

Question 24

If there is an nonzero force the object could be

Accepted Answer

neither

Question 25

The variable g represents what?

Accepted Answer

gravitational strength

Question 26

A football player with a higher mass also has a higher inertia.

Accepted Answer

True

Question 27

Inertia is the _____ an object has to a change in motion.

Accepted Answer

resistance

Question 28

The force exerted by an object depends on which two variables?

Accepted Answer

acceleration and mass

Question 29

____ is a friction like force that opposes the motion of falling objects.

Accepted Answer

air resistance

Question 30

What is a force?

Accepted Answer

A push or pull

Question 31

Every action has an equal and opposite reaction is which of Newton's laws?

Accepted Answer

3rd

Question 32

The ____ the object, the more air resistance it has.

Accepted Answer

bigger

Question 33

What is the weight of a person (mass 65 kg) on Planet X, where g = 10.2 m/s2?

Accepted Answer

663 N

Question 34

When you try to push your couch across the room but it won't move is an example of __ friction.

Accepted Answer

static

Question 35

The more friction the _____ the surfaces are.

Accepted Answer

rougher

Question 36

The coefficient of static friction is calculated using the following

Accepted Answer

Fs/Fn

Question 37

An object with a mass of 4 kg is pushed with a force of 20 N, what is the object's acceleration

Accepted Answer

5 m/s2

Question 38

A new born baby has a mass of weight of 16 N. What is the baby's mass?

Accepted Answer

1.63 N

Question 39

The traction of your car tires is an example of __ friction.

Accepted Answer

rolling

Question 40

Which equation represents Newton's 2nd law of motion?

Accepted Answer

F = ma

Question 41

This image represents which of Newton's Laws of motion?

Accepted Answer

2nd

Unit 4 Review: Forces and Newton's Laws

Questions 41

Unit 4 Review: Forces and Newton's Laws

Questions 41