Question

x=2t2+5t-9. Find velocity at time t=2S ?
answer me..​

Answer 1

Answer:

since x is given we will differentiate x with respect to time

v=4t +5

v=8+5=13

Answer 2

differenciation of displacement we get velocity

ds

---- = dv

dt

dx

----=4t+5= dv ..now velocity at t = 2 seconds is

dt 4 (2)+ 5 = 13