7 kg block is dropped onto a spring of spring constant 1115 N/m from a height of 900 cm. Find the speed of the block when the compression of the…

A 6.7 kg block is dropped onto a spring of spring constant 1115 N/m from a height of 900 cm. Find the speed of the block when the compression of the spring is 20 cm. The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s.