Calculate the gravitational potential energy of a 8 kg rock on top of a 40 m cliff. a1176 J b3136 J c2438 J d4396 J
Question
Calculate the gravitational potential energy of a 8 kg rock on top of a 40 m cliff.
Options:
- a) 1176 J
- b) 3136 J
- c) 2438 J
- d) 4396 J
Solution
To calculate the gravitational potential energy of the rock, we can use the formula:
Gravitational Potential Energy = mass * gravity * height
Given: Mass of the rock (m) = 8 kg Height of the cliff (h) = 40 m Acceleration due to gravity (g) = 9.8 m/s^2
Substituting the values into the formula:
Gravitational Potential Energy = 8 kg * 9.8 m/s^2 * 40 m
Calculating the result:
Gravitational Potential Energy = 3136 J
Therefore, the correct answer is b) 3136 J.
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