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CAIE IGCSE Physics 1.6.2 Impulse as force × time for which

Practise impulse as force acting for a time, linking FΔt to change in momentum and using units consistently in short calculations.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • use impulse = FΔt to calculate force, time, or impulse in N s
  • link FΔt to change in mv for a moving object during contact

1.6.2—Impulse as force × time for which question 1

[Maximum number: 1]

A ball is at rest on the ground. A boy kicks the ball. The boy's boot is in contact with the ball for a time of 0.040 s .

The average force on the ball is 200 N . The ball leaves the boy's boot with a speed of 20 m/s20 \mathrm{~m} / \mathrm{s}.
Which row gives the impulse of the boot on the ball and the average acceleration of the ball during the time of 0.040 s ?

impulse on ball
Ns

average acceleration of ball
m/s2\mathrm{m} / \mathrm{s}^{2}

8

0.8

8

500

5000

0.8

5000

500

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