You can determine the speed of a moving bullet by allowing the bullet to pass through two rotating paper disks mounted a distance, d, apart on the same axle, as shown in Figure 7-18. Find the bullet's speed for the following data.
d = 82.0 cm
ω = 880 rev/min (angular speed of the disks)
Δθ = 0.50 rad (angular displacement of the two bullet holes in the disks).