40. A pendulum, comprising a light string of length L and a S small sphere, swings in the vertical plane. The string hits a peg located a distance d below the point of suspension (Fig. P8.40). (a) Show that if the sphere is released from a height below that of the peg, it will return to this height after the string strikes the peg. (b) Show that if the pendu- Peg lum is released from rest at the hor- izontal position (0 = 90°) and is to swing in a complete circle centered on the peg, the minimum value of d must be 3L/5. %3D Figure P8.40
40. A pendulum, comprising a light string of length L and a S small sphere, swings in the vertical plane. The string hits a peg located a distance d below the point of suspension (Fig. P8.40). (a) Show that if the sphere is released from a height below that of the peg, it will return to this height after the string strikes the peg. (b) Show that if the pendu- Peg lum is released from rest at the hor- izontal position (0 = 90°) and is to swing in a complete circle centered on the peg, the minimum value of d must be 3L/5. %3D Figure P8.40
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter9: Energy In Nonisolated Systems
Section: Chapter Questions
Problem 51PQ: A small 0.65-kg box is launched from rest by a horizontal spring as shown in Figure P9.50. The block...
Related questions
Question

Transcribed Image Text:40. A pendulum, comprising a light string of length L and a
S small sphere, swings in the vertical plane. The string hits
a peg located a distance d below the point of suspension
(Fig. P8.40). (a) Show that if the
sphere is released from a height
below that of the peg, it will return
to this height after the string strikes
the peg. (b) Show that if the pendu-
Peg
lum is released from rest at the hor-
izontal position (0 = 90°) and is to
swing in a complete circle centered
on the peg, the minimum value of d
must be 3L/5.
%3D
Figure P8.40
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