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PHYSICS 111 HOMEWORK SOLUTION #7

PHYSICS 111 HOMEWORKSOLUTION #7 March 10, bead slides without friction around a looptheloop (see figure below).The bead is released from rest at a height h = a) What is its speed at point A (Use the following as necessary:the acceleration due to gravity g, and R.) b)How large is the normal force on the bead at point A if itsmass is grams?a)In the absence of friction, the energy of the bead is conserved so that on eachpoint of the track we have:mv22+mgH=Constant0 +mgh=12mv2A+mg 2R12mv2A=mg( 2R)vA= 2gR( 2)= )On point A, the centripetal force is the sum of gravity force and the normalforce:N+mg=mv2R=m ( 1)= 10 3= objects are connected by a light string passing over a light, fric-tionless pulley as shown in the figure below.

PHYSICS 111 HOMEWORK SOLUTION #7 March 10, 2013. 0.1 A bead slides without friction around a looptheloop (see gure below). The bead is released from rest at a height h = 3.30R. • a) What is its speed at point A (Use the following as necessary: the …

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