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16) When spiking a volleyball, a player changes the velocity of the ball from 4.2 m/s to -24 m/s; along a certain direction. If the impulse delivered to the ball by the player is -9.3 kg m/s, what is the mass of the volleyball?

Respuesta :

Given that initial velocity of the ball u = 4.2 m/s

Final velocity of the ball is v= -24m/s

Impulse of the ball, J= -9.3 kg m/s

If m is the mass of the ball, then

[tex]J=\text{ m(v-u)}[/tex]

Substituting the values, we get

[tex]\begin{gathered} m=\frac{-9.3}{-24-4.2} \\ =0.32\text{ kg} \end{gathered}[/tex]

Hence the mass of the volleyball is 0.32 kg.

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