Exam-style question
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A force-time graph shows a force of 10 N applied for 5 seconds. Calculate the impulse experienced by the object.
Model answer
What a good answer should say
- The impulse is 50 Ns.
Explanation
Why this works
This question tests the understanding of impulse as the area under a force-time graph. The formula for impulse is Impulse = Force × Time.
Substituting the values gives Impulse = 10 N × 5 s = 50 Ns. The answer is expressed in Newton-seconds, which is the correct unit for impulse.
Common mistake
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