What is a correct unit for the area under a force-time graph?
A
B
C
D - AQA - A-Level Physics - Question 7 - 2018 - Paper 1
Question 7
What is a correct unit for the area under a force-time graph?
A
B
C
D
Worked Solution & Example Answer:What is a correct unit for the area under a force-time graph?
A
B
C
D - AQA - A-Level Physics - Question 7 - 2018 - Paper 1
Step 1
A. N m
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Answer
The unit Newton meter (N m) represents torque or work done. It is not applicable to a force-time graph.
Step 2
B. kg m s⁻¹
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Answer
The unit kilograms times meters per second (kg m s⁻¹) represents momentum. This is also not the correct interpretation of area under a force-time graph.
Step 3
C. kg m s²
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Answer
The unit kilograms times meters per second squared (kg m s²) represents force. However, this does not directly relate to the area under a force-time graph.
Step 4
D. N s⁻¹
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Answer
The area under a force-time graph represents impulse, which is a change in momentum. The correct unit for impulse is Newton-seconds (N s) or equivalently, how long force acts. Thus, the correct answer is D. N s.
