A 1000kg rocket is moving forward at 10m/s in space. A 10,000N force is applied to the rocket for one second from behind. How fast is the rocket now traveling?

a. 0m/s
b. 10m/s
c. 15m/s
d. 20m/s

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  1. F = ma,
    a = F / m = 10000 / 1000 = 10m/s^2,

    V = Vo + at,
    V = 10 + 10*1 = 20m/s.

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  2. Resultant force divided by mass
    = 10000(force applied) +10000(f=m divided a) =20000 N
    20000 N divided by mass 1000kg= 20m/s

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