An unfueled 1 000-kg experimental rocket sled on level ...

[123654777]

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

[essyface1]

Answer to Question 1

b

Answer to Question 2

b