Physics

A rocket with initial mass of 7.50×103 kg is fired in the vertical direction. Its exhaust gases are ejected at the rate of 4.50×101 kg/s with a relative velocity of 2.200×103 m/s. What is the initial acceleration of the rocket?


What is the acceleration after 20 s have elapsed?

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asked by Helen
  1. F=ma

    mass*velocity= impulse
    in the first instance
    massrate*velocitygas= force
    45.0kg/s*2200m/s=ForceinNEwtons

    in twenty seconds, the mass of the rocket is reduced to 7.50E3-45.0*20

    a= force/mass= force above/newmass

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    posted by bobpursley

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