A ball is revolving horizontally in a circle and is held by a rigid rod. The mas

Question

A ball is revolving horizontally in a circle and is held by a rigid rod. The mass of the ball is 0.1kg. The path of the ball has an angular velocity of 10 rad/s and a radius of 0.1m. What is the linear speed of the ball in m/s? a. 1 b. 1/10 C. 1/100 d. 10 e. 100 A car goes around a curve and then around another curve. It experiences a centripetal force F1 going around the curve with radius 2R at a speed v. It then experiences a centripetal force F2 going around the second curve with radius 6R at a speed 3v. What is the ratio of the centripetal forces. F1/F2? a. 0.33 b. 0.75 c. 1 d. 3

Explanation / Answer

3. the angular velocity of the ball is = 10rad/s

radius r = 0.1m

So linear velocity v = r = (10rad/s)(0.1m) = 1m/s

So the correct option is a.

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