Native people throughout North and South America used a bola to hunt for birds a
ID: 2012098 • Letter: N
Question
Native people throughout North and South America used a bola to hunt for birds and animals. A bola can consist of three stones, each with mass m, at the ends of three light cords, each with length l. The other ends of the cords are tied together to form a Y. The hunter holds one stone and swings the other two stones above her head. Both stones move together in a horizontal circle of radius 2l with speed v0. At a moment when the horizontal component of their velocity is directed toward the quarry, the hunter releases the stone in her hand. As the bola flies through the air, the cords quickly take a stable arrangement with constant 120-degree angles between them. In the vertical direction, the bola is in free fall. Gravitational forces exerted by the Earth make the junction of the cords move with the downward acceleration . You may ignore the vertical motion as you proceed to describe the horizontal motion of the bolaExplanation / Answer
when bola in circular motion with 2l radius any particle on circumference having circular motion when the particle leave its position from in this motion will travel in stright line is the tangent of circle at that leaving point of particle . linear velocity of the particle direction is in this tangent line .
according to triangle law of vectors three vectors working at one point with direction and magnitude with angle 120 o the resultent force acting at that point is zero by this reason the cords quickly take a stable arrangement.
when discuss horizontal motion the bola having horizontal velocity is equal to vo is the velocity of the each stone . the junction of the cords works as center of gravity due to gravitational force the junction of bola having downward acceleration.
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