A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at $18\,\text{m/s}$. The third piece has $2.5$ times the mass of the other two.

Question

A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at $18\,\text{m/s}$. The third piece has $2.5$ times the mass of the other two.(a) Find the speed of the third piece.
, (b) What is the direction of the third piece?
, (c) The third piece then collides elastically with a bystander nearby. If the bystander could go back in time, explain what they could have done to reduce the impact force from the coconut piece. Justify your answer.
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Jason · Accepted Answer

10.18 m/s
45 degrees north east
Use protective measures or barriers that increase the time of impact, and therefore reduce the force imparted by the mass.

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