Sunday

April 20, 2014

April 20, 2014

Posted by **Emily** on Sunday, April 14, 2013 at 4:01pm.

11-087-clay_ball_hits_spiky_thing.jpg

(a) Which of the following statements are true about the device and the clay, for angular momentum relative to the axle of the device?

The angular momentum of the device is the same before and after the collision.Just before the collision the angular momentum of the wheel is 0.The angular momentum of the device is the sum of the angular momenta of all eight balls.The angular momentum of the device + clay just after the collision is equal to the angular momentum of the device + clay just before the collision.The angular momentum of the falling clay is zero because the clay is moving in a straight line.

(b) Just before the impact, what is the angular momentum of the combined system of device plus clay about the center C? (As usual, x is to the right, y is up, and z is out of the screen, toward you.)

LC,i = ???kg · m2/s

(c) Just after the impact, what is the angular momentum of the combined system of device plus clay about the center C?

LC,f = ???kg · m2/s

(d) Just after the impact, what is the angular velocity of the device?

omega vecf = ???radians/s

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