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Flashcards in Speed and Newtons Laws Deck (26)
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0
Q

What is inertia?

A

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

1
Q

What is the definition of Newton’s first law?

A

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

2
Q

What is the definition of Newton’s second law?

A

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

3
Q

What is the speed formula?

A

Speed= distance/time

4
Q

What is the formula for distance?

A

Distance= speed times time.

5
Q

What is velocity?

A

A speed in a given direction.

6
Q

What is the definition of acceleration?

A

Is the rate at which velocity changes.

7
Q

What are three ways acceleration changes?

A
  1. Increasing speed
  2. Decreasing speed
  3. Changing direction
8
Q

What is force?

A

Force is a push or a pull.

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

9
Q

What is friction?

A

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

10
Q

What is the formula for time?

A

Time= distance/ speed

11
Q

What is gravity?

A

Gravity is a force that pulls objects towards each other.

12
Q

What is the law of universal gravitation?

A

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

13
Q

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

A
  1. Mass of the object.

2. Distance between the object.

14
Q

How does mass affect the gravitational force?

A

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

15
Q

How does distance affect the gravitational force?

A

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

16
Q

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

A

Air resistance!

17
Q

Why do all objects fall at the same rate?

A

Gravity!

18
Q

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

  • remember the triangle! :)
A
Force= mass times acceleration 
Mass= force/ acceleration 
Acceleration= force/ mass
19
Q

What is the SI unit for acceleration?

A

Meters per second per second.

M/s^s

20
Q

What is an example of force?

A

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.

21
Q

What is the SI unit for force?

A

The Newton. (N)

22
Q

What is an example of friction?

A

An example of friction is rubbing your hands together.

23
Q

What is an example of gravity?

A

An example of gravity is the solar system.

24
Q

What is the definition of newtons third law.

A

For every action there is an equal and opposite reaction.

•Equal force, opposite direction.

25
Q

What is an example of Newton’s third law?

A

Shooting a gun and a rocket blasting off.