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Collisions in two Dimensions help?
Kevin has a mass of 92.0 kg and is skating with in-line skates. He sees his 20.50 kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.45 m/s. Ignoring friction, find Kevin's speed just before he grabbed his brother.
1 Answer
- 1 decade agoFavorite Answer
startin equation is
m1v1+m2v2=(m1+m2)v with all the ones and twos as subscript
set kevin as number 1 and his brother as number 2 (kevins mass as m1, his bros as m2, same with speeds)
92v1=(92+20.5)v
gives you 2.995sumthin...rounds to 3.00m/s with sigdigs
