Question

A 0.10 Kg model rocket’s engine is designed to deliver an impulse of 6.0 N·s. If

the rocket engine burns for 0.75 s, what is the average force does the engine

produce?

Answer 1

$m = 0.1kg$

$\Delta t = 0.75s$

$J = 6.0N*s$

$J = m\Delta v$

$F_{average} =ma= m\frac{\Delta v}{\Delta t}$

$J= F_{average}\Delta t$

$F_{average}= \frac{J}{\Delta t}= {6}{0.75}= 8N$

$\text{Answer: }8N$