3) A car travels along a road for a distance s in meters given by ?(?)=?3?9?2+15?+7 where t is time in second.

a) What time(s) will the car stop moving? (Hint: velocity is 0 m/sec.)

b) What is the acceleration(s) of the car when the car stop moving?

4) Given ?(?)=2?3?3?2?12?+8 represents the position of a particle travelling along a horizontal line, where t is the time since the beginning.

a) Find ??(?) and ???(?).

b) At time t = 1, is the particle moving to left or right, is it slowing down or speeding up? Explain

3) A car travels along a road for a distance s in meters given by 30:) = t3 9t2 + 15f + T wheret is time in second. a) What tin1e(s) will the car stop moving? (Hint: velocity is O mfsec.) b) What is the acceleration(s) of the car when the car stop moving? 4) Given 30:) = 2133 3t2 12t + 8 represents the position of a particle travelling along a horizontal line. where t is the time since the beg'nning. a) Find 5'03 and s"[t). b) At time t = l. is the particle moving to left or right. is it slowing down or speeding up? Explain