The Kinetic Energy Of Objects Speeding Up And Slowing Down

Question 1

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

Answer 1

Work - joules
Force - newtons
Distance - metres

Question 2

When is energy transferred?

Answer 2

When work is done

Work is done against frictional forces

Question 3

P = E / t

What do these symbolise and what are the measured in?

Answer 3

Power - is the woke done or energy transferred in watts

Energy - joules

Time - seconds

Question 4

Ep = m X g X h

What is this measured in?

Answer 4

Ep-change in gravitational potential energy in joules

Mass in Kg

Gravitational field strength newtons

Height in meters

Question 5

Ek = 1/2 X m X v^2

What is this measured in?

Answer 5

Ek is the kinetic energy in joules

Mass in Kg

V is speed in meter per second

Question 6

What is momentum?

Answer 6

It is a property of moving objects

Question 7

p = m X v

What is this measured in?

Answer 7

P is momentum in Kg m/s

Mass in Kg

Velocity is m/s

Question 8

What is conservation of momentum?

Answer 8

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

Question 9

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

Answer 9

Work is down