A 5 kg stone fell from a certain height. Find the kinetic energy of the stone at the midpoint of the path if it fell within 2 s.

univerkov | December 14, 2020 | education

Given: m = 5kg.
t = 2 s.
h = 20 m
Analysis: W = mgh
h = (gt * 2) / 2
Decision :
h = (gt ^ 2) / 2 = 10 * 4/2 = 20 m.
E. p. = 5 * 10 * 20 = 1000 J.
E. to. = 1000 J / 2 = 500 J.
Answer: 500J.

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