Exam-style question
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A force-time graph shows a constant force of 15 N applied for 4 seconds. What is the impulse?.
- A.60 Ns
- B.15 Ns
- C.4 Ns
- D.30 Ns
Model answer
What a good answer should say
- 60 Ns
Explanation
Why this works
The impulse can be found by calculating the area under the force-time graph. Since the force is constant, Impulse = Force × Time = 15 N × 4 s = 60 Ns.
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