Question

a box of lollipops accidentally falls from the back of a truck and hits the ground with a speed of 15 m/s. it slides along the ground for a distance of 45 m before coming to rest.
a)the time it takes to slide the last 10.0 meters

Answer 1

average speed is ... (15 m/s) / 2 = 7.5 m/s

it takes 6 s to stop ... (45 m) / (7.5 m/s)

the acceleration is ... (15 m/s) / (6 s) = 2.5 m/s^2

for the same acceleration
... stopping from 10.0 m takes the same amount of time as
... starting and going 10.0 m

10.0 = 1/2 * 2.5 * t^2