Question

A 800 g ball is pulled up a slope of height 20cm.Calculate potential energy it gains in joules.​

Answer 1

The loss of gravitational potential energy from moving downward through a distance h equals the gain in kinetic energy. This can be written in equation form as −ΔPEg = ΔKE. Using the equations for PEg and KE, we can solve for the final speed v, which is the desired quantity.