# An arrow fired from the bow vertically upward has acquired a maximum potential energy of 20 J

July 25, 2021 | education

| **An arrow fired from the bow vertically upward has acquired a maximum potential energy of 20 J, find the mass of the arrow if it is known that it has risen to a height of 25 m.**

To find the mass of the arrow taken, we will use the formula: En = m * g * h, whence we express: m = En / (g * h).

Variables and constants: En – maximum potential energy (En = 20 J); g (acceleration due to gravity) ≈ 10 m / s2; h – boom lifting height (h = 25 m).

Calculation: m = Ep / (g * h) = 20 / (10 * 25) = 0.08 kg (80 g).

Answer: The taken arrow has a mass of 80 g.

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