The blade of a windshield wiper moves through an angle of 90.0° in 0.397 s. The tip of the blade moves on the arc of a circle that has a radius of 0.376 m. What is the magnitude of the centripetal acceleration of the tip of the blade?

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 .

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.