Speed and Newtons Laws

Question 0

What is inertia?

Answer 0

Inertia is the tendency of an object to resist a change in motion.
* more mass = more inertia *

Question 1

What is the definition of Newton’s first law?

Answer 1

An object in motion will stay in motion, an object at rest will stay at rest unless acted on by an outside force.

Question 2

What is the definition of Newton’s second law?

Answer 2

Acceleration depends upon the objects mass and force acting on the object.
F=mass times acceleration.

Question 3

What is the speed formula?

Answer 3

Speed= distance/time

Question 4

What is the formula for distance?

Answer 4

Distance= speed times time.

Question 5

What is velocity?

Answer 5

A speed in a given direction.

Question 6

What is the definition of acceleration?

Answer 6

Is the rate at which velocity changes.

Question 7

What are three ways acceleration changes?

Answer 7

1. Increasing speed
2. Decreasing speed
3. Changing direction

Question 8

What is force?

Answer 8

Force is a push or a pull.

• It is described by its strength and the direction in which it acts.

Question 9

What is friction?

Answer 9

Friction is the force that two surfaces exert on each other when they rub against each other.

Question 10

What is the formula for time?

Answer 10

Time= distance/ speed

Question 11

What is gravity?

Answer 11

Gravity is a force that pulls objects towards each other.

Question 12

What is the law of universal gravitation?

Answer 12

It states that the force of gravity acts between all objects in the universe.

Question 13

What are two factors that affect the gravitational attraction between objects?

Answer 13

1. Mass of the object.

2. Distance between the object.

Question 14

How does mass affect the gravitational force?

Answer 14

• The more mass an object has, the greater the gravitational force.
Ex: weight on a scale

Question 15

How does distance affect the gravitational force?

Answer 15

• The farther apart two objects are, the less the gravitational force.
Ex: Astronaut in space

Question 16

What causes a leaf to fall more slowly than an acorn?

Answer 16

Air resistance!

Question 17

Why do all objects fall at the same rate?

Answer 17

Gravity!

Question 18

What is the formula you use to find force, mass, and acceleration?

• remember the triangle! :)

Answer 18

Force= mass times acceleration 
Mass= force/ acceleration 
Acceleration= force/ mass

Question 19

What is the SI unit for acceleration?

Answer 19

Meters per second per second.

M/s^s

Question 20

What is an example of force?

Answer 20

An example of force is if you push on a door you exert a force in a different direction then if you pull on the door.

Question 21

What is the SI unit for force?

Answer 21

The Newton. (N)

Question 22

What is an example of friction?

Answer 22

An example of friction is rubbing your hands together.

Question 23

What is an example of gravity?

Answer 23

An example of gravity is the solar system.

Question 24

What is the definition of newtons third law.

Answer 24

For every action there is an equal and opposite reaction.

•Equal force, opposite direction.

Question 25

What is an example of Newton’s third law?

Answer 25

Shooting a gun and a rocket blasting off.