Flashcards in Physics Paper 2 GCSE Deck (78)

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1

## What does scalar quantities only have?

### magnitude

2

## What does vector quantities have?

### magnitude and an associated direction

3

## How is vector quantities represented?

### arrow

4

## What does the length of the vector quantities arrows show?

### magnitude

5

## What does the direction of the arrow representing vector quantities show?

### direction of the vector quantity

6

## What is a force?

### a push or a pull that acts on an object due to the interaction with another object

7

## What are the forces between objects?

###
contact forces - the objects are physically touching

non-contact forces - the objects are physically seperated

8

## What is weight?

### force acting on an object due to gravity

9

## What does the weight of an object depend on?

### gravitational field strength at the point where the object is

10

## How do you calculate weight?

### mass x gravitational field strength

11

## What is the gravitational field strength of the earth?

### 10 n/kg

12

## How do you calculate work done?

### force x distance

13

## What is one joule in newton-metre?

### 1 newton-metre

14

## What does work done against the frictional forces acting on an object cause?

###
rise in the temperature of the object.

15

## To change the shape of an object what must happen?

### more than one force has to be applied – this is limited to stationary objects only

16

## Whats elastic deformation?

### elastic deformation is a change in shape of a material at low stress that is recoverable after the stress is removed.

17

## Whats inelastic deformation?

### a deformation occurring when a material is stressed beyond its elastic limit.

18

## What is the extension of an elastic object like compared to the force applied?

### The extension of an elastic object, such as a spring, is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.

19

## How do you calculate force?

### spring constant x extension

20

## What type of energy is stored in a spring?

### elastic potential energy

21

## How do you calculate elastic potential energy?

### 0.5 x spring constant x (extension)2

22

## How do you calculate moment of a force?

### force x distance

23

## How can you calculate pressure?

###
force normal to a surface/area of that surface

height of the column x density of the liquid x gravitational field strength

24

## A partially (or totally) submerged object experiences what?

### a greater pressure on the bottom surface than on the top surface. This creates a resultant force upwards. This force is called the upthrust.

25

## What does displacement include?

### Displacement includes both the distance an object moves, measured in a straight line from the start point to the finish point and the direction of that straight line. Displacement is a vector quantity.

26

## What is speed?

### Speed does not involve direction. Speed is a scalar quantity

27

## What is a typical value of someone walking?

### 1.5 m/s

28

## What is a typical value of someone running?

### 3 m/s

29

## What is a typical value of someone cycling?

### 6 m/s

30