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65. If a bucket of water spins about a vertical axis with constant angular velocity o (in radians per second), the water climbs up the side of the bucket until it reaches an equilibrium position (Figure 11). Two forces act on a particle located at a distance x from the vertical axis: the gravitational force -mg acting downward and the force of the bucket on the particle (transmitted indirectly through the liquid) in the direction perpendicular to the surface of the water. These two forces must combine to supply a centripetal force mo?x, and this occurs if the diagonal of the rectangle in Figure 11 is normal to the water's surface (i.e., perpendicular to the tangent line). Prove that if y = f(x) is the equation of the curve obtained by taking a vertical cross section through the axis, then -1/y' = -8/(@²x). Show that y = f(x) is a parabola. y =fr) mw?x mg FIGURE 11

65. If a bucket of water spins about a vertical axis with constant angular velocity o (in radians per second), the water climbs up the side of the bucket until it reaches an equilibrium position (Figure 11). Two forces act on a particle located at a distance x from the vertical axis: the gravitational force -mg acting downward and the force of the bucket on the particle (transmitted indirectly through the liquid) in the direction perpendicular to the surface of the water. These two forces must combine to supply a centripetal force mo?x, and this occurs if the diagonal of the rectangle in Figure 11 is normal to the water's surface (i.e., perpendicular to the tangent line). Prove that if y = f(x) is the equation of the curve obtained by taking a vertical cross section through the axis, then -1/y' = -8/(@²x). Show that y = f(x) is a parabola. y =fr) mw?x mg FIGURE 11

Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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65. If a bucket of water spins about a vertical axis with constant angular velocity o (in radians per second), the water climbs up the side of the bucket until it reaches an equilibrium position (Figure 11). Two forces act on a particle located at a distance x from the vertical axis: the gravitational force -mg acting downward and the force of the bucket on the particle (transmitted indirectly through the liquid) in the direction perpendicular to the surface of the water. These two forces must combine to supply a centripetal force mo?x, and this occurs if the diagonal of the rectangle in Figure 11 is normal to the water's surface (i.e., perpendicular to the tangent line). Prove that if y = f(x) is the equation of the curve obtained by taking a vertical cross section through the axis, then -1/y' = -8/(@²x). Show that y = f(x) is a parabola. y =fr) mw?x mg FIGURE 11
Transcribed Image Text:65. If a bucket of water spins about a vertical axis with constant angular velocity o (in radians per second), the water climbs up the side of the bucket until it reaches an equilibrium position (Figure 11). Two forces act on a particle located at a distance x from the vertical axis: the gravitational force -mg acting downward and the force of the bucket on the particle (transmitted indirectly through the liquid) in the direction perpendicular to the surface of the water. These two forces must combine to supply a centripetal force mo?x, and this occurs if the diagonal of the rectangle in Figure 11 is normal to the water's surface (i.e., perpendicular to the tangent line). Prove that if y = f(x) is the equation of the curve obtained by taking a vertical cross section through the axis, then -1/y' = -8/(@²x). Show that y = f(x) is a parabola. y =fr) mw?x mg FIGURE 11
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