Question detail
A 3 kg object is raised to a height of 4 m. Calculate the gravitational potential energy gained by the object, given that the gravitational field strength is 9.8 N/kg.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
A 3 kg object is raised to a height of 4 m. Calculate the gravitational potential energy gained by the object, given that the gravitational field strength is 9.8 N/kg.
Answer
117.6 J
Explanation
The answer is strong because it correctly uses the gravitational potential energy formula to find the energy gained. This question assesses the understanding of energy changes in a system when an object is raised. This answer is linked to Energy changes in systems because it applies the learning objective: Rearrange the specific heat capacity equation to calculate mass, specific heat capacity or temperature change.. It shows the Physics relationship clearly and keeps energy, power, work done and efficiency terms distinct where they appear.
Common mistake
Common Mistake in Rearranging Equations
Students often confuse the variables when rearranging the specific heat capacity equation, leading to incorrect calculations for mass, specific heat capacity, or temperature change.
To fix this, carefully identify each variable in the equation (change in thermal energy = mass x specific heat capacity x temperature change) and ensure you isolate the variable you need to calculate correctly.
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