Exam-style question
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A ball is dropped from a height of 20 meters. Calculate the gravitational potential energy (GPE) of the ball just before it hits the ground. Use g = 9.81 N/kg.
Model answer
What a good answer should say
- The gravitational potential energy of the ball just before it hits the ground is 196.2 J.
Explanation
Why this works
This question tests the understanding of gravitational potential energy and its calculation. The formula used is Ep = m x g x h, where the mass is derived from the weight of the ball.
The substitution of values shows the relationship between height and energy.
Common mistake
No common mistake is linked to this question yet.