An unfueled 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20-s burn.. If the rocket, initially at rest, moves at 160 m/s after the burn, what impulse is experienced by the rocket sled?
a. 1.1 105 kgm/s b. 1.6 105 kgm/s
c. 1.5 105 kgm/s d. 1.9 105 kgm/s
Question 2
A rocket of total mass M and with burnout mass 0.20M attains a speed of 3 400 m/s after starting from rest in deep space. What is the exhaust velocity of the rocket?
a. 6.8E+2 m/s
b. 2.1E+3 m/s
c. 1.7E+4 m/s
d. 2.2E+3 m/s
e. 1.1E+3 m/s
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