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Circular Motion Problems ANSWERS

Ftension Fgravity= N Circular Motion Problems ANSWERS 1. An g cork is swung in a horizontal circle with a radius of 35 cm. It makes 30 revolutions in 12 seconds. What is the tension in the string? (Assume the string is nearly horizontal) T=time/revolutions= s Period is the time per revolution F=ma Write down N2L Ftension = mv2/r Tension provides net force, acceleration is centripetal Ftension=m(4 2r/T2) Speed equals circumference divided by period Ftension= N Substitute values and calculate 2. A 15 g stopper is swung in a horizontal circle with a radius of meters. The tension in the string is Newtons. Find the speed of the stopper and determine how long it takes to complete 30 revolutions.

Dec 11, 2012 · c. Use trigonometry to find the x-component of the tension force. d. What is the radius of the ball’s motion? e. Use your answers to c & d to find the speed of the ball. F y =0 Motion is horizontal so y-forces must cancel y-component = 1.2 N y-component cancels force of gravity Tan 22.6o = F Tx /F Ty SOH-CAH-TOA F Tx

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