Question

If this guy is really faster than a speeding bullet (v=700m/s) and he has a mass of 100kg. How much force is behind him? *

A) 70000N
B) 9800N
C) 6860000N
D) We need his acceleration, not speed, to calculate this

show your work please

Answer 1

if we want to find force by using newton's law equation ( f = ma ) we have to use mass and acceleration not velocity ,but in this question they did not mention about acceleration but speed so the answer is D