Question

A stone of mass 64.0g is thrown vertically upward from the ground with an initial speed of 20.0m/s. The gravitational potential energy at the ground level is considered to be zero. Apply the principle of conservation of energy and calculate the potential energy at the maximum height attained by the stone, (g – 10ms^-2 )

Answer 1

When a stone is thrown vertically upward, work has to be done against gravity. At maximum height h. the work done = force x displacement

W = mg x h