The position of an object moving along x axis is given by x =a+ bt^2here a= 8.5 m, b = 2.5 ms^(-2)and t is timein second. Calculate the velocity at t = 0 and t = 2 s and also calculate average velocity between t = 2 s and t = 4 s.

The position of an object moving along x axis is given by x =a+ bt^2he

1.	The position of an object moving along x axis is given by x =a+ bt^2here a= 8.5 m, b = 2.5 ms^(-2)and t is timein second. Calculate the velocity at t = 0 and t = 2 s and also calculate average velocity between t = 2 s and t = 4 s.
Answer» SOLUTION :`v = (dx)/(DT) = (d)/(dt) (a +bt^2) = 2bt = 5.0 t ms^(-1)` At , `t = 0 , v = 0 ms^(-1)` and at `t = 2 s v = 10ms^(-1)` average VELOCITY` = ( x (4) - x(2) )/(4 - 2) = (a + 16b - a - 4b)/(2) = 6b = 6 xx 2.5= 15.0 ms^(-1)`