The start point of a ballistic launcer is h 1 = 17 cm above its launch point (in

Question

The start point of a ballistic launcer ish1 = 17 cm above its launch point (includingthe correction for the starting angle) and the launch point ish2 = 55 cm above the bench top. A steel ballrolled down the launcher has a mass of 37.5 g. Answer the followingquestion: Calculate the impact distance when UNC =0.01250 J. Express your answer in cm. The start point of a ballistic launcer ish1 = 17 cm above its launch point (includingthe correction for the starting angle) and the launch point ish2 = 55 cm above the bench top. A steel ballrolled down the launcher has a mass of 37.5 g. Answer the followingquestion: Calculate the impact distance when UNC =0.01250 J. Express your answer in cm.

Explanation / Answer

The mass of the steel ball is m = 37.5 g = 37.5 *10-3 kg The weight of the steel ball is w = mg Let the impact distance be d The work done by the steel ball to travel the impact distanceis W = mg * d The work done is equal to the kinetic energy of the ball whenit travels the impact distance therefore we get W = UNC or mg * d = UNC or d = (UNC/mg) where g = 9.8 m/s2

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