A car runs along a horizontal path at speed of 20m/s. The driver observes the rain hitting his car at 60 to vertical. If rain is actually falling vertically then what is speed of rain drop

The speed of the raindrop is 11.55 m/s.

Explanation:

We need to find the speed of the rain in the "y" direction. We have:

: speed of the raindrop at 60° (vertical) =?

: speed of the car = 20 m/s (in the "x" direction)

Hence, the speed of the car and the speed of the raindrop are related by:

Therefore, the speed of the raindrop is 11.55 m/s.

I hope it helps you!      

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.