Answer
The raindrops fall with a certain vertical velocity. The wind would give the raindrops a horizontal velocity. When we combine these two components of the velocity, we can find the resultant velocity of the raindrops. This resultant velocity will be directed at an angle. To protect ourselves from the raindrops, we should hold our umbrella at the angle which directly opposes the resultant velocity of the raindrops.
Work Step by Step
The raindrops fall with a certain vertical velocity. The wind would give the raindrops a horizontal velocity. When we combine these two components of the velocity, we can find the resultant velocity of the raindrops. This resultant velocity will be directed at an angle. To protect ourselves from the raindrops, we should hold our umbrella at the angle which directly opposes the resultant velocity of the raindrops.