A rocket of mass 4.5 x 10 5 kg is in flight.Its thrust is directed at an angle o

Question

A rocket of mass 4.5 x 105 kg is in flight.Its thrust is directed at an angle of 53.0° above the horizontal and has a magnitude of6.10 x 106 N.Find the magnitude and direction of the rockets acceleration. Givethe direction as an angle above the horizonal. magnitude 1 m/s2 direction 2° above horizontal #2 The speed of a bobsled is increasing because it has anacceleration of 2.5 m/s2. At agiven instant in time, the forces resisting the motion, includingkinetic friction and air resistance, total 450 N. The mass of thebobsled and its riders is 265 kg. (a) What is the magnitude of the forcepropelling the boblsed forward?
__________ N
magnitude 1 m/s2 direction 2° above horizontal #2 The speed of a bobsled is increasing because it has anacceleration of 2.5 m/s2. At agiven instant in time, the forces resisting the motion, includingkinetic friction and air resistance, total 450 N. The mass of thebobsled and its riders is 265 kg. (a) What is the magnitude of the forcepropelling the boblsed forward?
__________ N
(a) What is the magnitude of the forcepropelling the boblsed forward?
__________ N
magnitude 1 m/s2 direction 2° above horizontal

Explanation / Answer

since F =ma, acceleretaionhave the same direction with the force F. a = F/m = 6.10 x106 N/  4.5 x105 kg = 13.56 m/s2 answer: magnitude 1 m/s2 direction 2° abovehorizontal magnitude 1 m/s2 direction 2° abovehorizontal
#2 let magnitude of the force propelling the boblsed forward beF1, we have: F1 - 450N = ma = 265kg*2.5m/s2 = 662.5N =>F1 = 662.5N + 450N = 1112.5N . magnitude 1 m/s2 direction 2° abovehorizontal

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