Physics 9702 · AS & A Level · Non-uniform motion

Non-uniform motion — practice question

A low-mass ball is descending vertically through air. The graph shows how the resistive force $F_R$ varies with time $t$. At what times is the ball’s speed zero, when is its speed greatest, and when is its acceleration zero?

  • Azero speed $t_1$, maximum speed $t_2$, zero acceleration $t_1$
  • Bzero speed $t_1$, maximum speed $t_2$, zero acceleration $t_2$
  • Czero speed $t_2$, maximum speed $t_1$, zero acceleration $t_1$
  • Dzero speed $t_2$, maximum speed $t_1$, zero acceleration $t_2$

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