A heavy weight is suspended from a spring . A person raises the weight till the spring becomes slack . The done by him is W. The energy stored in the stretched spring was E . What will be the gain in gravitational potential energy? A man M1 of mass 80kg runs up a staircase in 15s. Another man M2 also of mass 80kg runs up the same staircase in 20s. The ratio of the power development by then will be: October 20, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 7 - Work, Energy and Power , Facebook Messenger WhatsApp Share this:TwitterFacebook Related