A 1 500-kg experimental rocket sled at rest on level frictionless ...

[ENagel]

A 1 500-kg experimental rocket sled at rest on level frictionless rails is loaded with 55.0 kg of propellant. It exhausts the propellant in a 20-s burn. The rocket moves at 155 m/s after the burn. What average force is experienced by the rocket during the burn?
 a. 4.26E+2 N
  b. 1.16E+4 N
  c. 1.21E+4 N
  d. 1.94E+2 N
  e. 2.33E+5 N

Question 2

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

[gabrielle_lawrence]

Answer to Question 1

b

Answer to Question 2

c

[ENagel]

Gracias!

[duy1981999]

TYSM