Question

Asked Apr 1, 2019

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The figure shows an overhead view of a 2.70 kg plastic rod of length 1.20 m on a table. One end of the rod is attached to the table, and the rod is free to pivot about this point without friction. A disk of mass 53.0 g slides toward the opposite end of the rod with an initial velocity of 20.5 m/s. The disk strikes the rod and sticks to it. After the collision, the rod rotates about the pivot point.

(a)

What is the angular velocity, in rad/s, of the two after the collision?

rad/s

(b)

What is the kinetic energy, in joules, before and after the collision?

KE_{i}

= J
KE_{f}

= JStep 1

(a)

Angular speed is,

Step 2

(b)

Kinetic energy before the collision is,

Step 3

Kinetic energy after th...

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