11th grade Physical Science
posted by britney .
How fast must a 1,000 kg car be moving to have a kinetic energy of: (a) 2.0 x 10^3, (b) 2.0 x 10^5, (c) 1.0 kW x h?
How high would you have to lift a 1,000 kg car to give it a potential energy of: (a) 2.0 x 10^3, (b) 2.0 x 10^5, (c) 1.0 kW x h?

1/2 m v^2=Ke
v= sqrt 2KE/m
PE=mgh
h= PE/mg 
A 2kg block rests on a wall that is 3 m tall. What is the gravitational potential energy of the block? The force of gravity on Earth (g) is equal to 9.8 m/s2.