A cockroach of mass m lies on the rim of a uniform disk of, Ask an Expert

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Q1. A siren is approaching you at 39m/s and is perceived to have a frequency of 1040 Hz. If the siren stops moving, what frequency do you now hear?

Q2. A 50.0 ball of clay travelling east at 2.00 collides and sticks together with a 60 ball of clay travelling north at 7.50.

What is the speed of the resulting ball of clay?

Q3. A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like the merry-go-round. At first the cockroach and disk rotate together with an angular velocity of 0.220 rad/s. Then the cockroach walks half way to the center of the disk.

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