Approximately how long will it take for a truck to go from 55 mph to a complete stop if it is decelerating at a rate of 5 feet/second/second?

Question

Quizplus · Accepted Answer

It will take approximately 16 seconds for a truck that goes from a 55 mph to a complete stop when decelerating at a rate of 5 feet/second/second. Solution: Use the final velocity formula to solve for time v_f = v_o + at Where v_f = 55 mph v_o = 0 mph a = -5 feet/second/second Therefore, 55 mph = 0 mph + 5 feet/second/second* (t) t = [55 mph *(1 hour/3,600 seconds) (5,280 feet/mile)]/5 feet/second/second t = 16 seconds

Approximately How Long Will It Take for a Truck to Go