A car travels due east with a horizontal speed of 44.4 km/h. Rain is falling vertically with respect to Earth. The traces of the rain on the side windows of the car make an angle of 68.4 degrees with the vertical.(adsbygoogle = window.adsbygoogle || []).push({});

(a) Find the velocity of the rain with respect to the car.

My attempt:

I thought perhaps I could model the solution from the problem involving the ground velocity of an airplane, as it flies through a wind that blows a different direction.

sin(theta)/V_rain = sin(90)/44.4 km/h

sin(68.4)/V_rain = sin(90)/44.4 km/h

44.4 km/h(0.930) = sin(90)(V_rain)

V_rain = 41.3 km/h

(b) Find the velocity of the rain with respect to Earth.

(Haven't attempted this one yet.)

All the Best,

Zem

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Rain's velocity with respect to a moving car

**Physics Forums | Science Articles, Homework Help, Discussion**