Question

S=3t^3+4t+9; Find the velocity at 3 sec. Find an average velocity between 1 to 4 sec.

Answer 1

Answer:

x=t  

2

+3t+4

v=  

dt

dx

​  

=2t+3

v  

avg

​  

=Σ  

6

v  

i

​  

 

​  

=  

6

(2×15)+(6×3)

​  

=8m/s

Explanation: