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homework 9

homework 9 - homework 09 NOORANI ZOHEB Latest unpenalized...

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homework 09 – NOORANI, ZOHEB 1 Latest unpenalized work: Feb 6 2008 Wednes- day 04:00 (after this date you can not make a perfect score). Work cutoff: Feb 7 2008, 4:00 am. Question 1, chap 4, sect 5. part 1 of 1 10 points A ball on the end of a string is whirled around in a horizontal circle of radius 0 . 382 m. The plane of the circle is 1 . 89 m above the ground. The string breaks and the ball lands 2 . 78 m away from the point on the ground directly beneath the ball’s location when the string breaks. The acceleration of gravity is 9 . 8 m / s 2 . Find the centripetal acceleration of the ball during its circular motion. Answer in units of m / s 2 . Question 2, chap 4, sect 5. part 1 of 2 10 points If the rotation of a planet of radius 5 . 89 × 10 6 m and free-fall acceleration 6 . 39 m / s 2 increased to the point that the centripetal acceleration was equal to the gravitational acceleration at the equator, what would be the tangential speed of a person standing at the equator?

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