The whole problem is in picture, but simply it says to find the max velocity of rocket, with those given units.
The whole problem is worked out with pounds, but when I try to do it for meter and Newtons I get like 50 times bigger answer.
The units :
Total Impulse of motor: 2.5 Newtons-second or 0.5056 pound-second
Duration of thrust: 0.42s
Burnout weight of model: 25.7 grams or 0.0787 pound
the equation to find max is
vmax = ( total impulse of motor x g ) / burnout weight of model
The Attempt at a Solution
I tried it like ten times but I get around 600 meters per second, and I have no idea why.
I did converted the grams to kilograms as are the Newtons, and I bet that there is small thing that I overlooked so I came here. HELP