Question

the velocity of a body moving with uniform acceleration is 10m/s at a particular instant. its velocity after 5 sec is 20m/s. what was the velocity of the body 3 sec before that instant?

Answer 1

a=(vf-vi)/time=(20-10)/5=2m/s^2

v(t)=vi+a(t)
v(-3)=10+2(-3)=4m/s