T3L3 Quiz

Question 1

A ____________ must act on an object to cause a change in motion.

Answer 1

net force

Question 2

In other words, an __________ at _________ will remain at rest unless acted upon by a ___________ net force.

Answer 2

object, rest, nonzero

Question 3

Another way to think about it: if an object is not _________, it will not start moving until a __________ acts upon it.

Answer 3

moving, net force

Question 4

If an object is moving, it will _________ at a constant __________ until a net force acts to change its speed or its ___________.

Answer 4

remain, velocity, direction

Question 5

If there is a net force acting on an object, it will ____________.

Answer 5

accelerate

Question 6

Resistance to a change in motion

Answer 6

intertia

Question 7

What is another name for Newton’s First Law?

Answer 7

The Law of Interia

Question 8

The amount of space something takes up

Answer 8

mass

Question 9

Why is it harder to stop a car from rolling verses a toy car?

Answer 9

The greater object (the car) has more mass, needing a greater force

Question 10

What is the relationship between mass and inertia?

Answer 10

The greater the mass the greater inertia

Question 11

Newton soon discovered that an object’s mass directly affects how much _________ is required to accelerate the object.

Answer 11

force

Question 12

What does it mean to accelerate an object?

Answer 12

increase/decrease the speed or change direction

Question 13

Assuming a constant net force, what happens to the acceleration of an object if you increase its mass?

Answer 13

decrease acceleration

Question 14

Assuming constant net force, what happens to the acceleration of an object if you increase its mass?

Answer 14

decrease acceleration

Question 15

What is the second law?

Answer 15

An objects mass directly affects how much force is needed to accelerate the object

Question 16

The size and direction of a net force equals the _______ times the acceleration. The net force has the same _________ as the acceleration.

Answer 16

mass, direction

Question 17

Equation for mass

Answer 17

M = F/A

Question 18

Equation for acceleration

Answer 18

A = F/M

Question 19

Your computer that you are typing on is resting on a surface. Gravity pulls it down on it, but another force (normal force) pushes up on the computer. The force exerted by the surface is __________ is strength and __________ in direction to the force the laptop exerts on the surface.

Answer 19

equal, opposite

Question 20

What is the 3rd law?

Answer 20

If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.

Question 21

An action force is always paired with a ___________ force.

Answer 21

reaction

Question 22

When you walk you exert an action force on the ground. What is the reaction force?

Answer 22

the ground

Question 23

When you hit a baseball with a bat the bat exerts an action force on the ball. What is the reaction force?

Answer 23

the ball on the bat

Question 24

Why do we not see the earth accelerating towards the pen even though we know it must be happening?

Answer 24

Earth has a large amount of mass

Question 25

If you stomp down on the earth with 500N, what would the reaction force be from the earth?

Answer 25

500N

Question 26

Equal forces acting on the same object that cancel each other out

Answer 26

balanced forces

Question 27

Two different objects exert two different forces on each other

Answer 27

action - reaction pair

Question 28

Summarize Newton’s First Law

Answer 28

An object that is still will remain still unless a force acts upon it. An object that is moving will remain moving unless a force stops it.

Question 29

Summarize Newton’s Second Law

Answer 29

Mass directly affects how much force is required to accelerate an object

Question 30

Summarize Newton’s Third Law

Answer 30

If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.