Question

A particle moves along X-axis in such a way that its coordinate X varies with the time t according to the expressions x = (8 – 5t + 8t²) meter. The initial velocity of the particle is 

(a) -5 m/s

(b) 8 m/s

(c) -8m/s

(d) +16 m/s

Answer 1

Answer is (a) -5 m/s

dx/dt = (-5 + 16t) ms^-1.

At t = 0, dx/dt = -5 ms^-1.