The blade of a windshield wiper moves through an angle of 180.0 degrees in 0.500 s. The tip of the blade moves on the arc of a circle of radius of 0.520 m. What is the magnitude of the centripetal acceleration of the tip of the blade

Centripetal acceleration will be equal to

Explanation:

We have given time taken to cover 180° is 0.5 sec

So time taken by 360° is equal to = 2×0.5 = 1 sec

Radius of the circle r = 0.520 m

So distance

So velocity

We have to find the centripetal acceleration

Centripetal acceleration will be equal to

So centripetal acceleration will be equal to

c.the charges if the proton and electron and gravity

the answer would be a