Question

displacement of particle is given by the equation s=9t^2+4t+6, where s is in metre and t is in second. find the instantaneous velocity of the particle at t=4 sec​

Answer 1

s=9t^2+4t+6

differentiate with respect to t

ds/dt=18t+4

t=4sec

ds/dt=18(4)+4=76m/s

hope it help u