Question

the velocity of a 0.25kg motorcycle rocket changes from 15m/s [up] to 40m/s [up] in 0.60 seconds. Calculate the force that the escaping gas exerts on the rocket?
What formula should i use to calculate this ?

Answer 1

@experimentX ?

Answer 2

not sure .. unless i know the answer.

Answer 3

answer is 13N [up]

Answer 4

14 or 10 ??

Answer 5

the book says 13

Answer 6

what formula do i use?

Answer 7

Not really sure ... since the rate of change of mass is also not given.

Answer 8

for the rocket
total Force=M*a
F'-W=M*a
and F'=F from Newton 3rd low