A 1 200-kg experimental rocket sled on level frictionless rails is loaded with 55.0 kg of propellant. It exhausts the propellant in a 20-s "burn." If the rocket, initially at rest, moves at 155 m/s after the burn, what impulse is experienced by the rocket sled?
a. 8.5E+3 kg/m/s
b. 1.3E+5 kg/m/s
c. 1.9E+5 kg/m/s
d. 8.5E+5 kg/m/s
e. 2.1E+5 kg/m/s
c
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