Question

Q1: An object moves along the x axis according to the equation:


$x(t) = {t}^{2} + 2t - 1$


Determine

(a) the average speed between t = 2 s and t = 3s

(b) the instantaneous speed at t = 2 s and at t = 3s

(c) the average acceleration between t =2 s and t = 3 s

(d) the instantaneous acceleration at t= 2 s and t = 3 s.​

Answer 1

Answer:

a = 21.6

b = t⁴/3×4 +t³/3-t²