A stone of mass 200g is dropped from a height of 4m Find its KE, PE at a height 3m and 1m above the surface
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All the forces acting are conservative so mechanical emergy will be conserved for the body .
Taking ground surgace as refrence point its initial potential energy is mgh =9.8J. (converting all perameters in SI units)
And final potential energy is zero as h=0.
Also its initial kinetic energy is zero.
Now applyning law of conservation of energy we get final kinetic energy is 9.8J
Explanation:
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