Num vagão ferroviário, que se move com velocidade Vo=3ms com relação aos trilhos, estão dois meninos que correm um em direção ao outro, cada um com velocidade V=3m/s, com relação ao vagão. A velocidade dos meninos VA e VB, com relação aos trilhos, será, respectivamen

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

Who was the first scientist to measure speed as distance over time?

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n