A car of mass 800 kg travels over a hill of height h. hill
h
NOT TO
SCALE
By travelling to the top of the hill, the car gains 40000 J of gravitational potential energy.
The gravitational field strength g is 10N/kg.
What is the height h of the hill?
A 5.0m
B
20m
C 50 m
D 500 m

conservation of mass

mass before something happens = mass afterwards

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