Physics 0625 · IGCSE · Momentum

Momentum — practice question

The mass of a tennis ball is $57\text{ g}$. A tennis player strikes the tennis ball using a tennis racket. At the instant it meets the racket, the tennis ball is moving at $25\text{ m s}^{-1}$. After leaving the player’s racket, the velocity of the tennis ball is $15\text{ m s}^{-1}$ in the direction opposite to its initial approach. The tennis racket exerts an average force of $35\text{ N}$ on the ball. How long does the tennis ball remain in contact with the tennis racket?

  • A$0.015\text{ s}$
  • B$0.016\text{ s}$
  • C$0.065\text{ s}$
  • D$0.65\text{ s}$

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