The bullet first passes through the left disk and then, Ask an Expert

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The drawing shows a device that can be used to measure the speed of a bullet. The device consists of two rotating disks, separated by a distance of d = 0.650 m, and rotating with an angular speed of 60.0 rad/s. The bullet first passes through the left disk and then through the right disk. It is found that the angular displacement between the two bullet holes is θ = 0.320 rad. From these data, determine the speed of the bullet.

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