Question

The brakes are set on a train running at 30 miles per hour, when ½ miles from a station. The slows down uniformly, coming to rest at the station. Find the acceleration, and the time elapsed in stopping.

Answer 1

Acceleration =ΔvΔt

                       = 30/60           

                       =0.5 m/s

Time = 0.5 * 0.5

= 0.25

=0.25 * 60

= 15 minutes