Flashcards in Forces Deck (16):

1

## What are the contact forces?

###
Friction.

Pull.

Air resistance.

Push.

2

## What are the non contact forces?

###
Gravity.

Magnetism.

Electrostatic.

3

## What are the vectors?

###
Velocity.

Displacement.

Acceleration.

Deceleration.

4

## What are the scalars?

###
Speed.

Distance.

Time.

5

## What is Hooke's law?

### The extension of a spring directly proportional to the force applied, as long as the limit of proportionality has been reached.

6

## What is force measured in?

### Newtons.

7

## What does mass depend on?

### The quantity of matter in it.

8

## What is mass measured in?

### Kilograms.

9

## What is weight?

### The force acting on the object due to gravity.

10

## What is weight measured in?

### Newtons.

11

## What do you use to measure weight?

### Newton-meter.

12

## What is the equation for constant speed?

###
distance travelled, s (metres, m)

Speed, v (metres per second, m/s)=_______________________________

time taken, t (seconds, s)

13

## What is velocity?

### Speed in a given direction. Two moving objects could have the same speed but different velocities.

14

## Is there velocity in an object moving round in a circle?

### Object moving round in a circle has direction of motion that changes continuously as it goes round. so its velocity is not constant even if its speed is constant.

15

## What is acceleration?

###
Change in velocity

Acceleration, a (metres per second, m/s2)=_______________________

Time taken for the change

16