Question detail
A ball of mass 0.5 kg is dropped from a height of 20 m. What is the gravitational potential energy at the top?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. 100 J
- B. 50 J
- C. 200 J
- D. 150 J
Answer
100 J
Explanation
The correct option is "100 J". 100 J is right because it directly matches Changes in energy: Rearrange energy equations to find mass, speed, spring constant, extension, gravitational field strength or height where appropriate.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Common Mistake in Rearranging Equations
Students often confuse the variables when rearranging energy equations, leading to incorrect calculations of mass or height.
To fix this, carefully identify each variable in the equation and ensure you understand the relationships between them before rearranging.
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