JEE MainPhysicsWork Power and EnergyNumerical+4 / −1
A ball of mass 100 g is dropped from a height h = 10 cm on a platform fixed at the top of a vertical spring (as shown in figure). The ball stays on the platform and the platform is depressed by a distance . The spring constant is Nm 1. (Use g = 10 ms 2) 
Numerical answer
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