Question

Bob has total mechanical energy of 250 J. If the highest that Bob can go during the swing is 1.276 m, what is his mass?

Answer 1

Answer:

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Explanation:

Total mechanical energy(M.E) = 250J

Height (H) = 1.276 m

Gravity(g) = 10 ms^-1

M.E = mgh

250 = m×10×1.276

250 = m×12.76

250/12.76 = m

M = 19.59 N

Mass(m) ≈ 20 N