(a) Show that the angle that the total velocity vector makes with the horizontal at the point of release A is given by a = tan-1(1/b). For the rest of the problem, use a = 0.005 and b = 0.4. (b) If the ball on the string is swung at a constant angular velocity of 6 rad/s, determine the speed of the ball at point A when 0 = 4π radians. (c) Determine the magnitude of the ball's total acceleration the instant before it is released at A. (d) If the ball is released at point A at h = 1 meter above the ground, determine the time it takes for the ball to hit the ground.

University Physics Volume 1
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Chapter2: Vectors
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Problem 2.10CYU: Check Your Understanding Verify that vector v V obtained in Example 2.14 is indeed a unit vector by...
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A child is playing with a ball connected to a string. As the child swings the ball
around, the string is gradually released so that the ball follows a path defined by the
function r = aebe, where a and b are constants, r is the radial coordinate measured
in meters, and is the transverse coordinate measured in radians from the positive
horizontal axis, as shown. The ball is released at point A after making two full
revolutions (i.e., when 0 = 47 radians).
(a) Show that the angle that the total velocity vector makes with the horizontal at
the point of release A is given by a = tan-1(1/b).
For the rest of the problem, use a = 0.005 and b = 0.4.
(b) If the ball on the string is swung at a constant angular velocity of 6 rad/s,
determine the speed of the ball at point A when 0 = 47 radians.
(c) Determine the magnitude of the ball's total acceleration the instant before it is
released at A.
(d) If the ball is released at point A at h = 1 meter above the ground, determine the
time it takes for the ball to hit the ground.
Transcribed Image Text:A child is playing with a ball connected to a string. As the child swings the ball around, the string is gradually released so that the ball follows a path defined by the function r = aebe, where a and b are constants, r is the radial coordinate measured in meters, and is the transverse coordinate measured in radians from the positive horizontal axis, as shown. The ball is released at point A after making two full revolutions (i.e., when 0 = 47 radians). (a) Show that the angle that the total velocity vector makes with the horizontal at the point of release A is given by a = tan-1(1/b). For the rest of the problem, use a = 0.005 and b = 0.4. (b) If the ball on the string is swung at a constant angular velocity of 6 rad/s, determine the speed of the ball at point A when 0 = 47 radians. (c) Determine the magnitude of the ball's total acceleration the instant before it is released at A. (d) If the ball is released at point A at h = 1 meter above the ground, determine the time it takes for the ball to hit the ground.
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