actice Assignment Gradebook ORION Downloadable eTextbook gnment NEXT Chapter 08,

Question

actice Assignment Gradebook ORION Downloadable eTextbook gnment NEXT Chapter 08, Problem 15 The figure 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 0.880 m, and rotating with an angular speed of 98.2 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 = 0.347 rad. From these data, determine the speed of the bullet. Number Units the tolerance is +/-2%

Explanation / Answer

Apply rotationa kinematic equation

theta = wt

t = theta/ w

=0.347/98.2

=0.00353 s

speed of the bullet is

v = d/t = 0.880/0.00350 = 251.42 m/s

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