Calc II. A car is traveling 60mi/h along a straight road deccelerates at a constant rate of 11 ft/s^2. (88 ft/s = 60mi/h)
a) how long will it take until the speed is 45 mi/h?
b) how far will the car travel before coming to a stop? Thanks in advance :]

Question

Calc II. A car is traveling 60mi/h along a straight road deccelerates at a constant rate of 11 ft/s^2. (88 ft/s = 60mi/h)
a) how long will it take until the speed is 45 mi/h?
b) how far will the car travel before coming to a stop? Thanks in advance :]

anonymous · Answer

$$V _{f} = V _{i} +at$$

anonymous · Answer

convert acceleration to mi/h^2   and using Vf=45  Vi=60, solve for t (in hours)