Question

A) Calculate the kinetic energy of a 6kg object that speeds from 3m/s to 7m/s In 5s

B) calculate the force required for this acceleration to occur

Answer 1

kinetic energy =1/2 mv^2
given:m=6kg,s1=3m/s,s2=7m/s,t=5s.
velocity (v) =speed / time = s2-s1/t=4/5
K. E=1/2 x6x4/5x4/5=48/25