Account for the fact that balls kineticenergy has increased

Reference no: EM13565084

A charging bull elephant with a mass of 5240 kg comes directlytoward you with a speed of 4.55m/s. You toss a 0.150 kg rubber ballat the elephant with a speed of 7.81 m/s.
a) when the ball bounces back toward you, what is itsspeed?
b) how do you account for the fact that the balls kineticenergy has increased?

Reference no: EM13565084

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