Final answer:
The velocity of the raindrops as measured by someone in the car is -17.5 m/s.
Step-by-step explanation:
The velocity of the raindrops as measured by someone in the car can be found using the concept of relative velocity. Relative velocity is the vector difference of the velocities of two objects. In this case, the raindrops are falling vertically at 4.5 m/s relative to the Earth, while the car is moving at 22.0 m/s in a straight line.
To find the velocity of the raindrops as measured by someone in the car, we need to subtract the velocity of the car from the velocity of the raindrops. Therefore, the velocity of the raindrops as measured by someone in the car is:
4.5 m/s - 22.0 m/s = -17.5 m/s
The negative sign indicates that the raindrops appear to be moving in the opposite direction of the car's motion. Therefore, the speed of the raindrops, as measured by someone in the car, is 17.5 m/s.