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If Jocko has a mass of 60 kg and stands at rest on ice catches a 20 kg ball that is thrown to him at 10 kmh How fast does Jocko and the ball move across the ice?
Wiki User
∙ 14y ago
force = mass x acceleration
force = mass x (distance/sec2)
force x distance = mass x (distance2/sec2) force x distance= work done (energy)
energy = mass x velocity2 10km/h = 10000m/h = 166and 2/3 m/s
energy as ball hits person on ice = 20 x 166.672 = 555577.778Joules
now energy is neither created nor destroyed it is simlply transferred from one form to another
assuming ice has no friction then
555577.778= newmass x velocity2
velocity2 = 555577.778/80 = 6944.722225
velocity = 83.335m/s = 5000.1m/h = 5km/h
Wiki User
∙ 14y ago
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