L2 - gravitational potential energy stores

Question 1

define ‘mass’.

Answer 1

the amount of matter inside an object (kg).

Question 2

define ‘weight’.

Answer 2

how much force it exerts downwards in the presence of gravity (newtons, N).

Question 3

what is the gravitational field strength on Earth?

Answer 3

9.8N/kg.

Question 4

rearrange Ep=wxh
(gravitational potential=weight x change of height)

Answer 4

w=Ep/h
h=Ep/w

Question 5

rearrange Ep=mxgxh
(gravitational potential=mass x gravitational field strength x change of height)

Answer 5

m=Ep/gxh
g=Ep/mxh
h=Ep/mxg