Question

s=3t²+4t+9
Find velocity at t= 2 sec and average velocity between 1 and 4s​

Answer 1

Answer:

v= 16 m/s,Vavg=57 m/s

Explanation:

V=ds/dt, Vavg=change in displacement/change in time=S2-S1/t2-t1

thus , 1stquestion, only differential

Answer 2

Answer:

s=3t²+4t+9

Find velocity at t= 2 sec