Question

7. The position of an object moving along x axis is given by x= 10t + 15t^3 and t is measured in seconds. What is its velocity and acceleration at t = 2.0s​

Answer 1

by diferentiating displacement we get velocity

as v=dx/dt

and a= dv/dt

so if x=10t + 15t³

then v=10+45t²

for t=2

v=10 + 45x4

 =190

a=90t

for t=2

a=180