The ballistic pendulum used to be a common tool for the determination of the muzzle velocity of bullets as a measure of the performance of firearms and ammunition (nowadays, the ballistic pendulum has been replaced by the ballistic chronograph, an electronic device). The ballistic pendulum is a simple pendulum that allows one to record the maximum swing angle of the pendulum arm caused by the firing of a bullet into the pendulum bob.
Figure P5.42
Let L = 1.5 m and mA = 6 kg. For George Washington’s 0.58 caliber pistol, which fired a roundball of mass mB = 87 g, it is found that the maximum swing angle of the pendulum is θmax = 46°. Determine the preimpact speed of the bullet B.
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