1.

A body of mass 5 kg is raised to a height of 50m. Calculate the potential energy of the body.

Answer»

We know that, potential energy due to gravitation is given byP.E. = mghwhere, m is the mass,g is the gravityh is the heightGiven, m = 5 kg, P.E. = 490 joules, g = 9.8 m/s^2490 = 9.8 X 5 x HH = 490/(9.8 x 5)H = 490/49h = 10 mHence, the body should be RAISED to the height of 10 m



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