Question

A particle moves in a straight line with an acceleration a ms^-2 at time 't' seconds where a = - 1/t² when t=1 the particle has a velocity of 3ms^-1 then find the velocity when t=4

Answer 1

dv/dt = -1/t^2

v = (1/t) + c

3 = 1 + c
c = 2

v = (1/t) + 2
if t = 4
v = 2.25