Question

A particle move with velocity v1 for time t1 and v2 for time t2 along a straight line . The magnitude of its average acceleration is .....

Answer 1

$\frac{t1.t2(v1 + v2)}{v1 + v2}$
I think this may be the answer.

Answer 2

Please find the answer below:

Keeping in view that, A particle move with velocity v1 for time t1 and v2 for time t2 along a straight line.

The magnitude of its average acceleration is ( v2 - v1 ) / ( t2 - t1)

This calculated with the formula of acceleration i.e:

Acceleration = ( final velocity - initial velocity )/ (change in time)