A model rocket is constructed with a motor that can provide a total impulse of 32.0 N·s. The mass of the rocket is 0.130 kg. What is the speed that this rocket achieves when it is launched from rest? Neglect the effects of gravity and air resistance.
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Fnet ΔT=M(vf-vi) (impulse=momentum)
32=.13(vf-0)
32=.13vf
vf=246.2 m/s
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impulse = change in momentum = m delta v
if the rocket starts from rest, then delta v = vfinal - vinitial = vfinal
therefore,
v final = impulse/m = 32Ns/0.13kg = 246.1 m/s
Acceleration = Force/Mass
Acceleration = 32/0.13
Acceleration = 246.1538461538462...