Impulse and force–time area

Repair the common break

Common misconception: Impulse is the peak force on a force–time graph.

Correct model: Impulse is the signed area under the force–time graph and equals the momentum change.

Worked transfer

A triangular force pulse of height 600 N and duration 0.020 s gives impulse ½(600)(0.020) = 6.0 N s, equal to the signed momentum change.

Guided practice

Explain why “Impulse is the peak force on a force–time graph.” fails. Then construct one example that correctly applies impulse and force–time area.

Independent practice

A force rises uniformly from 0 to 400 N in 0.010 s, remains constant for 0.015 s, then falls to zero in 0.005 s. Find the impulse.

Return to the recorded repair plan when the explanation and application are secure enough to re-test.