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Physics > momentum 5 > Flashcards

momentum 5 Flashcards

1
Q

Equation

A

Momentum (p) (in kg m/s) = mass m (kg) x velocity, v (in m/s)

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2
Q

symbol for momentum

A

p

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3
Q

What is the equation for force?

A 
Force = change in momentum / time taken 
Force= (mv - mu) / t
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4
Q

What is the relationship between momentum before and after a collision?

A

Moment before the collision = moment after the collision

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5
Q

How do you increase momentum?

A

force x time = increase in momentum

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6
Q

What is force?

A

A vector quantity

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7
Q

How do air bags help increase car safety?

A

cushion and prevent cuts

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8
Q

How do helmets help increase car safety?

A

motor cyclists safety helmets padded inside so as to extend time of any collision

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9
Q

How do seat belts help increase car safety?

A

Stop you tumbling around inside the car if there is a collision

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10
Q

Change in momentum

A

force x time

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11
Q

Vector

symbol

A

Vectors have size and direction

ram

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12
Q

Scalar

symbol

A

Scalar quantities only have size

uni hat

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13
Q

Temperature vs

A

scalar

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14
Q

How do you work out resultant force?

A

Combine vectors

-Add them end to end

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15
Q

Location for force

A

5

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16
Q

location momentum

A

xtratherm

17
Q

friction is a

A

Force

18
Q

buoyancy location

A

23

19
Q

friction loc

A

16

20
Q

What is the strength of Earth’s gravitational field?

A

10 N/Kg (9.8)

21
Q

What are forces measured in?

A

Newtons (N)

22
Q

How do you work out weight?

A 
weight = mass x g
N = Kg x N/Kg
23
Q

Weight loc

A

1

24
Q

What happens if the forces acting in opposite directions are the same size to the unbalanced force

A

The unbalanced force is zero

25
Q

What apparatus would you use to measure weight?

A

A spring balance or a newton balance

26
Q

Friction is a force that opposes

A

Motion

27
Q

What is Hooke’s Law?

A

Force = spring constant x extension

28
Q

Hooke loc

A

1

29
Q

Drag is a type

A

friction

30
Q

What is the relationship between force and acceleration?

A

Proportional

31
Q

acceleration loc

A

mam kettle

32
Q

Work out force

A

acceleration x mass

33
Q

What is a negative acceleration?

A

deceleration

34
Q

How can you measure terminal velocity?
sym
loc

A

By using a light gate and a data logger.
paper
1

35
Q

Falling loc

symbol

A

1

feather

36
Q

thinking distance loc

A

1

37
Q

breaking distance loc

A

2

38
Q

Stopping distance loc

A

3

39
Q

earth loc

A

3

Physics (21 decks)

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