Flashcards in Motion Deck (20):

1

## What is the difference between a vector and scalar?

###
A scalar quantity is a one dimensional measurement of a quantity

A vector has more that one number associated with it

2

## What is the difference between weight and mass?

###
Mass is the actual amount of material contained in a body (it’s measured in kg) (ITS A SCALAR)

Weight is the force exerted by the gravity on an object (ITS A VECTOR)

3

## What is the difference between displacement and distance?

###
Distance refers to how much ground the object has covered during its motion (ITS A SCALAR)

Displacement is the distance between starting and ending point (it’s the object overall change in position)(ITS A VECTOR)

4

## What is acceleration?

### The rate of change of velocity per unit of time

5

## What is force?

### And influence that changes the motion of a body, or causes motion stress on a stationary object.

6

## What is momentum?

### The quantity of motion of a moving body, measured as a product of its mass and velocity.

7

## What is energy?

### Energy is something that is needed to make things happen or change (measured in joules) cannot be created or destroyed but it can be transferred and stored.

8

## What is the distance, speed and time equation?

###
Distance

——————-

Speed X Time

9

## How do you work out distance?

### Speed X time

10

## How do you work out speed?

### Distance % time

11

## How do you work out time?

### Distance % speed

12

## What is the typical speed for walking?

### 3.1 mph

13

## What is the typical speed for running?

### 8.3 mph

14

## What is the typical speed for cycling?

### 9.6 mph

15

## How do you work out speed from distance time graphs?

### Look and the distance and speed axis then do distance % time.

16

## What is the acceleration, velocity and time equation?

###
Change in speed

———————————-

Acceleration X Time

17

## What is the acceleration in free fall?

### 9.8 metres per second per second (9.8 m/s/s)

18

## What does magnitude tell you?

###
The size of an object’s displacement

e.g. if an object is displaced along the x-axis by -3 (west) then the magnitude of displacement is 3. And the displacement is 3 West.

19

## What does velocity time graphs tell you?

###
They give information about the journey of an object.

You can also work out the acceleration of the object and the distance travelled during the journey.

20