# Forces

0.0 / 5

HideShow resource information

- Created by: lottiebissett
- Created on: 13-05-18 21:05

What does Newtons Third Law say?

when 2 ojects interact, the forces that they exert are equal and opposite

1 of 59

Whats a vector quantity?

These have a magnitude and a direction

2 of 59

3 Examples of vector quantities

displacement, force, acceleration

3 of 59

What is a scalar quantity?

These only have a magnitude and no direction

4 of 59

3 Examples of scalar quantities

temperature, speed, distance

5 of 59

What are vector quantities represented by?

arrows

6 of 59

What does the length of the arrow for vectors represent?

shows the magnitude

7 of 59

1 Example of a contact force

friction

8 of 59

What is a contact force?

When 2 objects have to be tocuhing for a force to act

9 of 59

What is a non-contact force?

When objects dont need to be touching for a force to act

10 of 59

1 example of a non-contact force

gravitational force

11 of 59

What is meant by the phrase interaction pair?

a pair of forces that are equal and oppoiste and act on two interacting objects

12 of 59

What are 2 effects of things being closely attracted to planets/ stars?

1. It gives everything a weight. 2. Makes all things on planets surface to fall to ground

13 of 59

What is mass?

amount of stuff in an object

14 of 59

What is weight?

force acting on an object due to gravity

15 of 59

What is weight measured in?

Newtons (N)

16 of 59

What is mass measured in?

Kilograms (Kg)

17 of 59

What is meant by the term centre of mass?

a point at which you assume the whole mass is concentrated

18 of 59

What is the equation for weight?

weight = mass x gravitational field strength

19 of 59

What are the units for gravitational field strength?

N/Kg

20 of 59

What does it mean by the term resultant force?

The overall force on a point or an object

21 of 59

Equation for work done?

work done = force x distance

22 of 59

What does equilibrium mean?

If all the forces acting on an object combine to give a resultant force of 0, then the object is equilibrium

23 of 59

What is moment?

The turning effect of a force

24 of 59

What is the equation for moment?

moment = force x distance

25 of 59

What does distance actually mean in the equation for moment?

The perpendicular distance to from the pivot to he line of action of the force

26 of 59

What do levers do?

increase the distance from pivot at which the force is applied

27 of 59

What do gears do?

transmit rotational effects

28 of 59

What happens when gear teeth interlock?

turning one gear, causes another one to turn but in the opposite direction

29 of 59

Why will a force given to a larger gear cause a bigger moment?

because the distance to the pivot is bigger

30 of 59

Do smaller or bigger gears turn faster?

small

31 of 59

What is the definition of distance?

How far an object has moved

32 of 59

What quantity is distance?

scalar

33 of 59

What is the definition of displacement?

Measures the distance adn direction in a straight line from an objects starting point to end point

34 of 59

Why is distance a scalar quantity?

Because it doesnt involve a direction

35 of 59

What is meant by speed?

how fast you are going with no regard to a direction

36 of 59

What is velocity?

the speed in a given direction

37 of 59

What is the equation for distance travelled?

distance travelled = speed x time

38 of 59

What is the equation for speed?

speed = distance / time

39 of 59

What does acceleration mean?

change in velocity in a given time

40 of 59

equation for acceleration?

acceleration = change in velocity / time

41 of 59

what does deceleration mean?

negative acceleration

42 of 59

What does uniform acceleration also mean?

constant acceleration

43 of 59

what is the equation for uniform acceleration?

v(squared) - u (squared) = 2as

44 of 59

V in SUVAT =?

Final velocity

45 of 59

U in SUVAT =?

Initial velocity

46 of 59

a in SUVAT =?

Acceleration

47 of 59

s in SUVAT =?

Distance

48 of 59

t in SUVAT =?

Time

49 of 59

On distance-time graphs, what does the gradient equal?

speed

50 of 59

On distance-time graphs, what do flat sections mean?

something is stationary

51 of 59

What does stationary mean?

something isnt moving

52 of 59

On distance-time graphs, what do straight, uphill lines mean?

travelling at a constant speed

53 of 59

On distance-time graphs, what do curves mean?

either acceleration or deceleration

54 of 59

On velocity-time graphs, what does the gradient equal?

acceleration

55 of 59

On velocity-time graphs, what do flat sections mean?

travelling at a steady speed

56 of 59

On velocity-time graphs, the stepper the graph...

the bigger accelration or deceleration

57 of 59

On velocity-time graphs, downhill sections mean...

deceleration

58 of 59

On velocity-time graphs, what do curves mean?

changing acceleration

59 of 59

## Other cards in this set

### Card 2

#### Front

Whats a vector quantity?

#### Back

These have a magnitude and a direction

### Card 3

#### Front

3 Examples of vector quantities

#### Back

### Card 4

#### Front

What is a scalar quantity?

#### Back

### Card 5

#### Front

3 Examples of scalar quantities

#### Back

## Related discussions on The Student Room

- A forces and motion AS question. »
- VM445 - Accountability for preventable armed forces deaths ... »
- AS Level Maths forces and motion help please? »
- As maths forces and motion »
- I really need help with this forces and motion physics question »
- A level maths forces and motion questions »
- Forces and Motion GCSE AQA unit P2 »
- I need help with this question on forces and motion »
- M1-Forces and motion in 2D »
- VM229 - Motion on Equality in the Armed Forces »

## Similar Physics resources:

1.0 / 5

0.0 / 5

2.5 / 5

0.0 / 5

0.0 / 5

2.0 / 5

0.0 / 5

0.0 / 5

1.0 / 5

0.0 / 5

## Comments

No comments have yet been made