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Setler [38]
3 years ago
12

Uma garota de 50 kg esta sobre um skate de 10kg,ambos movendo se em sentido horizontal, da esquerda para a direita, a velocidade

de 2m/s com relacao ao solo. Em determinado instante, a garota pula para a frente á velocidade horizontal de 3m/s, apos o pulo, em relacao ao solo. Qual é a velocidade do skate apos o pulo da garota?
Physics
1 answer:
pashok25 [27]3 years ago
8 0

M = mass of the girl = 50 kg

m = mass of skate = 10 kg

V' = initial velocity of girl and skate together before the girl jump = 2 m/s

V = velocity of girl after the jump relative to ground = 3 m/s

v = velocity of the skate after girl jumps = ?

using conservation of momentum

(M + m) V' = MV + m v

inserting the values in the above equation

(50 + 10) (2) = (50) (3) + 10 v

v = - 3 m/s



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