Practice Problem #1. Suppose your rocket has an empty mass of 110g.
You add 450ml of water. Water begins leaving your rocket at a time of
3.15s. At this time, your rocket's velocity is approximately 4m/s.
The last bit of water leaves your rocket a time of 3.72s, and at that time your
rocket's velocity has reached 35m/s.
What is your rocket's average
force of thrust over this time period?Practice Problem #2. Suppose your rocket has an empty mass of 95g. You add 300ml of water. Water begins leaving your rocket at a time of 1.64s. At this time, your rocket's velocity is approximately 2m/s. The last bit of water leaves your rocket a time of 2.58s, and at that time your rocket's velocity has reached 50m/s. What is your rocket's average force of thrust over this time period? |