Answer:
Explanation:
Given that,
The blade of a windshield wiper moves through an angle of 90.0° in 0.397 s
The radius of the circlular path is 0.376 m
We need to find the magnitude of the centripetal acceleration of the tip of the blade. Let it is a. The formula of the centripetal acceleration is given by :
v is velocity,
It moves through an angle of 90 degrees, it means
So,
So, the magnitude of the centripetal acceleration of the tip of the blade is .
On the surface of the Earth, the acceleration due to gravity is
<em>9.8 meters/sec² </em>(rounded)
toward the center of the Earth.
Wherever we are, since that's the direction in which things fall when they're
dropped, we call the direction toward the center of the Earth by the name "<u>down</u>",
although it's a different direction in every place.