Question: The blade of a windshield wiper moves through an angle of 90.0o in 0.40 s. The tip of the blade moves on the arc of

The blade of a windshield wiper moves through an angle of 90.0o in 0.40 s. The tip of the blade moves on the arc of a circle that has a radius of 0.45 m. What is the magnitude of the centripetal acceleration of the tip of the blade?

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