A small metal ball is suspended from the ceiling by a thread of negligible mass. The ball is then set in motion in a horizontal circle so that the thread describes a cone. The acceleration of gravity is 9.8 m/s^2.
Thread - 2.7m
Angle - 25 degrees
Mass of Ball - 6.3kg
thank you.What is the speed of the ball when it is in circular motion?2.7cos(25) = 2.447m
2.7-2.447 =0.253m
PE = mgh = 6.3 x 9.8 x 0.253 = 15.62 J
PE = KE
KE = 1/2mv^2
15.62/(1/2m) = v^2, sq-rt = v = 2.23 m/s
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