A 70-kg astronaut is space-walking outside the space capsuleand is stationary wh

Question

A 70-kg astronaut is space-walking outside the space capsuleand is stationary when a tether line breaks. As a means ofreturning to the capsule he throws a 2.0 kj space hammer at a speedof 14 m/s away from the capsule. At what speed does the astronautmove toward the capsule? The answer is 0.40 m/s. Please explain. A 70-kg astronaut is space-walking outside the space capsuleand is stationary when a tether line breaks. As a means ofreturning to the capsule he throws a 2.0 kj space hammer at a speedof 14 m/s away from the capsule. At what speed does the astronautmove toward the capsule? The answer is 0.40 m/s. Please explain.

Explanation / Answer

From law of conservation of momentum 2.0kg(14m/s) = - (70kg)v then v = 2.0(14) / 70 = 0.4 m/s

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