Question

A 2m wide truck is moving with uniform speed of 8m/s along a straight horizontal road. A pedestrian starts crossing the road at an instant when the truck is 4m away from him. The minimum constant velocity with which he should run to avoid an accident-

Answer 1

@mathslover pls help

Answer 2

@nincompoop

Answer 3

@nincompoop pls help

Answer 4

@mathslover pls help

Answer 5

@ParthKohli pls help

Answer 6

any ideas???????????????????????

Answer 7

can any1 help

Answer 8

In order to avoid being stuck the pedestrian must cross a distance of 2m
(this assumes the truck is adjacent to the pavement)

He must do that in the time it takes the truck to reach his position.

The truck is 4m away and travelling at 8m/s -
SO - how long does it take for the truck to reach the pedestrian's position??

When you know that - then the pedestrian must cover 2m in the same time - so you can get his required speed.