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?

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

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d