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Science · Grades 9–12

Linear momentum

Momentum has direction; retain the sign of velocity in one dimension.

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The key idea

Momentum has direction; retain the sign of velocity in one dimension.

p = mv

Worked examples

A mass of 26 kg has velocity 16 m/s. Find its signed momentum in kg·m/s.

26 × 16 = 416

416 kg·m/s

A mass of 48 kg has velocity -27 m/s. Find its signed momentum in kg·m/s.

48 × -27 = -1296

-1296 kg·m/s

Try it yourself

  1. A mass of 31 kg has velocity 26 m/s. Find its signed momentum in kg·m/s.

  2. A mass of 17 kg has velocity 22 m/s. Find its signed momentum in kg·m/s.

Check your understanding

Answers and marking notes
  1. 806 kg·m/s

    31 × 26 = 806

  2. 374 kg·m/s

    17 × 22 = 374

Further reading and review references

These are reference links, not copied exercises, institutional endorsement or proof of independent review.

Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.