PH 105 Midterm: ph105_sum15_exam2
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Instructions: solve 4 of 5 problems below. All problems have equal weight: you must answer all parts of multi-part questions for full credit, show your work for full credit. The distance from the xed end to a xed peg at point p is d. when the initially stationary ball is released with the string horizontal as shown, it will swing along the dashed arc. While the ramp surface is frictionless, the block experiences a coe cient of kinetic friction k on the. Assume that the energy of the stone remains constant as it moves around the circle. Show that if the string is to remain taut at the top of the circle, the speed of the stone at the bottom of the circle must be at least 5gr. Name & id: a bullet of mass m and speed v is shot at a wooden block of mass m .
