Question

the distance s km traveled by a train in t hours is given by s= t^3+3t^2+t-6. find the velocity & acceleration at the end of 3 hours​

Answer 1

Answer:

velocity = 17 km / hour

Step-by-step explanation:

given

S = t3 + 3t2 + t- 6

t = 3

S= 3×3×3 + 3×3×3 + 3 - 6

S = 51 km

V = S /T

V = 51 / 3

V = 17 km / hour

acceleration is same as velocoty if initial velocity is zero