Rain is falling vertically with a speed of 30 m s-1. A woman rides a bicycle with a speed of 10 m s-1 in the north to south direction. What is the direction in which she should hold her umbrella?
= Velocity of the cyclist, andvr
= Velocity of falling rain
The woman must hold her umbrella in the direction of the relative velocity (v
) of the rain, in order to protect herself from the rain.
Therefore, the woman must hold the umbrella towards the south, at an angle of 18o