Author Question: An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 ... (Read 670 times)

magmichele12 · **on:** Jul 28, 2018

An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s burn.. The rocket moves at 160 m/s after the burn. What average force is experienced by the rocket during the burn?
a. 0.80 104 N
c. 0.60 104 N
b. 0.75 104 N
d. 0.35 104 N

Question 2

Charge A has 10 electric field lines coming out, charge B has 20 lines coming out, and charge C has 30 lines coming in. Which pair of these charges will have the largest force between them if placed one cm apart?
a. A and B
c. More information is needed. b. B and C
d. C and A