A hockey puck with a mass of 160 g slides at a speed of 12 m/s on frictionless i

Question

A hockey puck with a mass of 160 g slides at a speed of 12 m/s on frictionless ice. The puck runs into a small box with a mass of 850 g that is initially at rest. Assuming that the collision is elastic, what is the maximum speed of the box after the collision? 8.2 m/s 3.8 m/s 5.6 m/s 2.3 m/s 6.0 m/s A hockey puck with a mass of 160 g slides at a speed of 12 m/s on frictionless ice. The puck runs into a small box with a mass of 850 g that is initially at rest. Assuming that the collision is elastic, what is the maximum speed of the box after the collision? 8.2 m/s 3.8 m/s 5.6 m/s 2.3 m/s 6.0 m/s 8.2 m/s 8.2 m/s 8.2 m/s 3.8 m/s 5.6 m/s 2.3 m/s 2.3 m/s 2.3 m/s 6.0 m/s

Explanation / Answer

v2 ={ u2(m2-m1)+2m1u1}/(m1+m2)

m1 = 160

m2 = 860

u1 = 12, u2 =0

v2 = 3.76 is the answer

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