Author Question: A 1 500-kg experimental rocket sled at rest on level frictionless rails is loaded with 55.0 kg of ... (Read 681 times)

ENagel · **on:** Jul 28, 2018

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