Question: If a 15 kg object is dropped from a height of 20 m, what is its potential energy just before it hits the ground?
Options:
300 J
1500 J
600 J
1200 J
Correct Answer: 1500 J
Solution:
Potential energy PE = mgh = 15 kg * 9.81 m/s² * 20 m = 2943 J.
If a 15 kg object is dropped from a height of 20 m, what is its potential energy
Practice Questions
Q1
If a 15 kg object is dropped from a height of 20 m, what is its potential energy just before it hits the ground?
300 J
1500 J
600 J
1200 J
Questions & Step-by-Step Solutions
If a 15 kg object is dropped from a height of 20 m, what is its potential energy just before it hits the ground?
Potential Energy – Potential energy is the energy stored in an object due to its position in a gravitational field, calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.
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