19 October, 07:09

# A rock has a mass of 25kg. The acceleration due to gravity is 10m/s and the height of the rock is 42 m. Find the potential energy of the rock

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1. 19 October, 07:49
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The potential energy of the rock = 10.5 kN

Explanation:

Mass of rock = 25 kg

Acceleration due to gravity = 10 m/s²

Height = 42 m

Potential energy, PE = mgh, where m is the mass, g is acceleration due to gravity and h is the height.

PE = 25 x 10 x 42 = 10500 N = 10.5 kN

The potential energy of the rock = 10.5 kN
2. 19 October, 10:04
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The answer is Potential energy is equal to 10500 Joules

Step by step Explanation:

1) Potential Energy is the energy that a body located at a certain height above the ground has.

2) The potential energy is expressed by the formula PE = mgh where (PE) is the potential energy (m) represents the mass, (g) represents the acceleration of gravity, and (h) represents the height.

3) Knowing this we can continue to replace the values given in the problem:

PE = (25Kg) (10m/s^2) (42m)

PE = 10500J