A vertical spring with constant 200 N/m has a light platform on its top

cbse
workandenergy

#1

A vertical spring with constant 200 N/m has a light platform on its top. When a 500 g mass is kept on the platform spring compresses 2.5 cm. Mass is now pushed down 7.50 cm further and released. How far above later position will the mass fly?


#2

When the external force is removed after the push, the mass gets detached when spring obtain its natural length and say, mass m rises h height from the pushed position.

Loss in potential energy of spring = Gain in gravitational potential energy.

h = 0.2 m