a tennis player smashes a ball of mass m horizontally at a vertical wall. The ba

Question

a tennis player smashes a ball of mass m horizontally at a vertical wall. The ball rebounds at the same speed v with which it struck the wall. Has the momentum of the ball changed, and if so, by how much? a tennis player smashes a ball of mass m horizontally at a vertical wall. The ball rebounds at the same speed v with which it struck the wall. Has the momentum of the ball changed, and if so, by how much? a tennis player smashes a ball of mass m horizontally at a vertical wall. The ball rebounds at the same speed v with which it struck the wall. Has the momentum of the ball changed, and if so, by how much?

Explanation / Answer

The change in momentum of the ball is

delta P = m v - m( -v)

           = m ( v + v )

           = 2 m v

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