a. shows a bead sliding on a wire, How large must height h1 be if the bead, starting at rest A, is to have a velocity of 200cm/s at point B? Ignore friction
When a bead has dropped a distance h it has lost potential energy = mgh, where m is the mass of the object, and g is the acceleration due to gravity, 9.8 . This potential energy will become kinetic energy .
Answer: 20.4 cm
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