Question

a particle is moving in a straight line.its displacement at any instant t is given by x=10t+15t^3,where x is in metre and t is in seconds.find the average acceleration in the interval t=0 and t=2 sec.​

Answer 1

70 m/sec^2..............

Answer 2

instantaneous velocity=DX/dt =1

0+30t. at t=2sec. v=10+30(2)=70m/s