The Kinetic Energy Of Objects Speeding Up And Slowing Down Flashcards Preview

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Flashcards in The Kinetic Energy Of Objects Speeding Up And Slowing Down Deck (9)
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1

Work done = force X distance
W = F X d
What is it measured in?

Work - joules
Force - newtons
Distance - metres

2

When is energy transferred?

When work is done

Work is done against frictional forces

3

P = E / t
What do these symbolise and what are the measured in?

Power - is the woke done or energy transferred in watts

Energy - joules

Time - seconds

4

Ep = m X g X h
What is this measured in?

Ep-change in gravitational potential energy in joules

Mass in Kg

Gravitational field strength newtons

Height in meters

5

Ek = 1/2 X m X v^2

What is this measured in?

Ek is the kinetic energy in joules

Mass in Kg

V is speed in meter per second

6

What is momentum?

It is a property of moving objects

7

p = m X v

What is this measured in?

P is momentum in Kg m/s

Mass in Kg

Velocity is m/s

8

What is conservation of momentum?

When the total momentum before an event is equal to the total momentum after the event. This happens in a closed system

9

What happens when force causes an object to move though a distance?

Work is down