Question

a body is 2kg dropped from a height of 5m its total energy when it is at a height of 2m will be​

Answer 1

Answer:

When mass is at height 5 m Its potential energy = mgh

Explanation:

g = 9.8 m/s2 Thus, P.E. = 2 x 9.8 x 5 = 98 J Wehn object is at maximum height P.E. = maximum and K.E. = 0 When ball is allowed to fall down and reaches the midpoint of the heighth = 2.5 mThus, P.E = 2 x 9.8 x 2.5 = 49 J We know, Total energy = Potential energy + Kinetic energy .... (by law of conservation of energy)In this case, T.E. = 98 J as at half of the journey in this case - K.E. = 49 J and P.E. = 49 J

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