velocity of a particle varies with time as v=t^2-t-2. average speed of the particle in time interval from t=0 to t=4sec?

Dear student,

For average speed we need to know the total distance travelled by particle in 4 seconds.



velocity of body is zero at t=2 seconds and the velocity reverses its direction.

Distance travelled upto 2 seconds=

Distance travelled from t=2 to t=4 =



Hence total distance travelled by body=

Hence average speed=3m/s