Question

Guys please solve que no2 please it is the part of que no 3

Answer 1

Explanation:

r = r0(1-at)t

r = r0(t) - r0(at²)

When particle returns to its start position the r = 0

So, 0 = r0(t) - r0(at²)

Or, t = 1/a

Note : To solve question 3 , differentiate both sides w.r.t time & put t = 1/a