A ball of mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms-1 and rebounds with the same speed. Determine the impulse experienced by the ball

  • A 20.0kg ms-1
  • B 10.0kg ms-1
  • C 5.0kg ms-1
  • D 1.3kg ms-1
  • E 0.0kg ms-1.
waec 1996physics

The correct answer is A. 20.0kg ms-1

Impulse = Ft = mu - (-mu)

= mu + mu = 2mu = 2 x 5 x 2 = 20kgms-1

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