A solid cylinder rolls from the back of a large truck travelling at `10 m//s` to the right. The cylinder is travelling horizontally at `8m//s` to the left relative to an observer in the truck. The ball lands on the roadway `1.25m` below its starting level. How far behind the truck does it land (in `m`)?

Answer

D

Explanation

`1.25=1/2(10)t^(2)`
`:.t=0.5` sec
Distance of the cylinder from the truck `=8xx0.5=4m`