The distance travelled by a particle in time t is given by `s=(2.5m/s^2)t^2`. Find a. the average speed of the particle during the time 0 5.0 s, and b. the instantaneous speed ast t=5.0 is

Explanation

`s_("rev")=u_("rev")t+1/2 a_("rev")t^(2)`
`0=-10t+t^(2)`
`t=0, t=10` sec
`t=10` sec