Centripetal Force of a Ball Revolving Uniformly in a Horizontal Circle Date of Exam May 2018 Subject Mathematics, Surveying and Transportation Engineering Problem A 150 g ball at the end of a string is revolving uniformly in a horizontal circle of radius 0.600 m. The ball makes 2 revolutions in a second. What is the centripetal acceleration? A. 74.95 m/sec2 C. 49.57 m/sec2 B. 94.75 m/sec2 D. 59.47 m/sec2 Answer Key Click here to show or hide the Answer Key [ B ] Solution Click here to expand or collapse this section Angular Speed ω=2 revsec⋅2π radrev=4π rad/sec Linear Speed v=rω=0.6(4π)=2.4π m/sec Centripetal Acceleration ac=v2r=(2.4π)20.6 ac=94.79 m/sec2 ← answer Category Engineering Mechanics Physics Motion in a Curve Motion with Constant Velocity Motion with Changing Direction Centripetal Acceleration Angular Speed Linear Speed Log in or register to post comments