Question

kin What is the velocity of a 220 kg rocket fired straight up 10 sec, after lift off, if the thrust of engine is 2800N? mass 220 kg time 10s​

Answer 1

Answer:

Mass of rocket, m=20,000kg

Initial acceleration, a=5m/s

2

g=10m/s

2

Using Newton's second law of motion, the net force (thrust) acting on the rocket is given as:

F=mg+ma=m(a+g)=20000(10+5)=20000×15=3×10

5

N

F=3×10

5

N