Physics 9702 · AS & A Level · Momentum and Newton's laws of motion

Momentum and Newton's laws of motion — practice question

A lorry with a mass of $20\,000\,\text{kg}$ experiences a constant resultant force $F$. Its speed increases from $6.0\,\text{m s}^{-1}$ to $30.0\,\text{m s}^{-1}$ over $300\,\text{s}$. Determine the lorry’s change in momentum and the value of $F$?

  • Achange in momentum $= 48\,000\,\text{N s}$, force $= 160\,\text{N}$
  • Bchange in momentum $= 480\,000\,\text{N s}$, force $= 1600\,\text{N}$
  • Cchange in momentum $= 600\,000\,\text{N s}$, force $= 2000\,\text{N}$
  • Dchange in momentum $= 600\,000\,\text{N s}$, force $= 20\,000\,\text{N}$

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