Question

The potential energy of a 25 kg bicycle resting at the top of a 3 m high hill is _______ J

Answer 1

Hello!

The potential energy of a 25 kg bicycle resting at the top of a 3 m high hill is _______ J

If: 1 Joule = 1 kg.m²/s²

We have the following data:

GPE (Gravitational Potential Energy) = ? (in J)

m (mass) = 25 kg

g (gravity) ≈ 9.81 m/s²

h (height) = 3 m

We apply the data to the formula of the gravitational potential energy, we have:

$GPE = m*g*h$

$GPE = 25\:kg*9.81\:\dfrac{m}{s^2} *3m$

$GPE = 735.75\:kg*\dfrac{m^2}{s^2}$

$\boxed{\boxed{GPE = 735.75\:J}}\:\:\:\:\:\:\bf\green{\checkmark}$

Answer:

735.75 J

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Answer 2

The potential energy:
E p = m · g · h
m = 25 kg,  g = 9.81 m/s²,  h = 3 m
E p = 25 kg · 9.81 m/s² · 3 m = 735.75 J