A car is travelling
along a curved path of radius
200 ft. If its initial speed is 10 ft/s and if the speed is increasing
at (1.2)t ft/s^{2}, what is the magnitude of its acceleration
when t = 5 s.

a. 6.56 ft/s^{2}
b. 6.66 ft/s^{2}
c. 6.86 ft/s^{2}
d. 6.76 ft/s^{2}

Given data:

r - radius
of curved path = 200 ft
v_{0} - Initial speed = 10 ft/s

When t = 5 s
v = (0.6) 25 + 10 = 15 + 10 = 25 ft/s