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A bar of mass M = 1.00 kg and length L = 0.20 m is lying on a horizont al frictionless surface. One end of the bar is pivoted at a point about which it is free to rotate. A small mass m = 0.10 kg is moving on the same horizontal surface with 5.00 m s −1 speed on a path perpendicular to the bar. It hits the bar at a distance L/2 from the pivoted end and returns back on the same path with speed v. After this elastic collision, the bar rotates with an angular velocity . Which of the following statement i s correct?
- = 6.98 rad s −1 and v = 4.30 m s −1
- = 3.75 rad s −1 and v = 4.30 m s −1
- = 3.75 rad s −1 and v = 10.0 m s −1
- = 6.80 rad s −1 and v = 4.10 m s −1
Correct answer: = 6.98 rad s −1 and v = 4.30 m s −1
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