Question

A rock has a potential energy of 155,000 J. It is at a height of 85 m. What is the mass of the rock?

Answer 1

Answer:

182.35 kg is the mass

Explanation:

Given :-

P.E. = 155000 J

height = 85 m

g = 10 m/s^2

Potential energy = mgh

155000 J = m × 10 × 85

155000 / 850 = mass

182.35 kg is the mass

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Answer 2

Answer:

182.35

Explanation:

p.e=mgh   g=10m/s

p.e=155000

155000=m(85 x 10)

155000=850m

m=182.35(2d.p)