A hockey puck has a firecracker in it and is initially at rest. It explodes into

Question

A hockey puck has a firecracker in it and is initially at rest. It explodes into 3 pieces of equal mass. Piece #1 moves due north, and piece #2 moves due east. Which piece has the largest speed? a) piece #1 b) piece #2 c) piece #3 d) they have equal speeds e) need more information A hockey puck has a firecracker in it and is initially at rest. It explodes into 3 pieces of equal mass. Piece #1 moves due north, and piece #2 moves due east. Which piece has the largest speed? a) piece #1 b) piece #2 c) piece #3 d) they have equal speeds e) need more information a) piece #1 b) piece #2 c) piece #3 d) they have equal speeds e) need more information

Explanation / Answer

using conservation of momentum

total momentum finaly = zero

so the momentum of third mass must be equal to the resultat momentum of first two masses

this will be greater than the two individual velocities of first two masses

Ans: c) piece #3

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