Question

A particle moves in a straight line with an acceleration a m/s2 at time t seconds, where 
a = -1/t^2. When t=1 the particle has a velocity of 3m/s. If the velocity of the particle at t = 4s is 9/n. The value of n is​

Answer 1

Answer:

n = -9

Explanation:

t = 1

a = -1/t^2. = -1m/s^2

u = 3 m/s

therefore ,

v =  u + at

v = 3 + -1 * 4 = -1m/s

v = -1 = 9/n

n = -9