(adsbygoogle = window.adsbygoogle || []).push({}); 1.The blade of a windshield wiper moves through an angle of 90 degrees in .28 . The tip of the blade moves on the arc of a circle that has a radius .76m. What is the magnitude of the centripetal acceleration at the tip of the blade.

2. Ac= v^2/r

3. okay, the accleration should equal r(theta)/t

but whenever I plug in my variables and solve I get an answer in the 7000s which is not reasonable at all.

The actual answer is 24 m/s^2 but I have no idea how to get there.

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# Homework Help: Finding centripetal acceleration

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