A stone of mass 500 grams is dropped from a height of 6 metres and hits the ground. Find the potential energy it loses.55 J67 J33 J30 J
Question
A stone of mass 500 grams is dropped from a height of 6 metres and hits the ground. Find the potential energy it loses.55 J67 J33 J30 J
Solution
The potential energy (PE) of an object can be found using the formula:
PE = mgh
where: m is the mass of the object, g is the acceleration due to gravity, and h is the height from which the object is dropped.
Given: m = 500 grams = 0.5 kg (since 1 kg = 1000 grams), g = 9.8 m/s² (approximate value on Earth), and h = 6 m.
Substituting these values into the formula gives:
PE = 0.5 kg * 9.8 m/s² * 6 m = 29.4 J.
So, the stone loses approximately 30 J of potential energy when it hits the ground.
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