In the figure here, a solid brass ball of mass 0.382 gwill roll smoothly along a loop-the-loop track whenreleased from rest along the straight section. Thecircular loop has radius R = 0.18 m, and the ball hasradius r << R.(a) What is h if the ball is on the verge of leaving thetrack when it reaches the top of the loop?(b) If the ball is released at height h = 7R, what is themagnitude of the horizontal force component actingon the ball at point Q?h(a) h =(b) F=486i 7.14NOR73

mass (m)=0.382 g=0.382×10-3 kgR=0.18 m

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