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--Select--- ---Select--- to the right to the left There is no horizontal component. A person on horseback is on a drawbridge which is at an angle = 20.0° above the horizontal, as shown in the figure. The center of mass of the person-horse system is d = 1.35 m from the end of the bridge. The bridge is l = 7.00 m long and has a mass of 2,300 kg. A cable is attached to the bridge 5.00 m from the frictionless hinge and to a point on the wall h = 12.0 m above the bridge. The mass of person plus horse is 1,100 kg. Assume the bridge is uniform. Suddenly (and most unfortunately for the horse and rider), the ledge where the bridge usually rests breaks off, and at the same moment the cable snaps and the bridge swings down until it hits the wall. (a) Find the angular acceleration (magnitude, in rad/s²) of the bridge once it starts to move. rad/s² (b) How long (in s) does the horse and rider stay in contact with the bridge while it swings downward? S (c) Find the angular speed (in rad/s) of the bridge when it strikes the vertical wall below the hinge. rad/s (d) Find the force (in kN) exerted by the hinge on the bridge immediately after the cable breaks. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction kN -Select--- (e) Find the force (in kN) exerted by the hinge on the bridge immediately before it strikes the wall. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction KN -Select---

--Select--- ---Select--- to the right to the left There is no horizontal component. A person on horseback is on a drawbridge which is at an angle = 20.0° above the horizontal, as shown in the figure. The center of mass of the person-horse system is d = 1.35 m from the end of the bridge. The bridge is l = 7.00 m long and has a mass of 2,300 kg. A cable is attached to the bridge 5.00 m from the frictionless hinge and to a point on the wall h = 12.0 m above the bridge. The mass of person plus horse is 1,100 kg. Assume the bridge is uniform. Suddenly (and most unfortunately for the horse and rider), the ledge where the bridge usually rests breaks off, and at the same moment the cable snaps and the bridge swings down until it hits the wall. (a) Find the angular acceleration (magnitude, in rad/s²) of the bridge once it starts to move. rad/s² (b) How long (in s) does the horse and rider stay in contact with the bridge while it swings downward? S (c) Find the angular speed (in rad/s) of the bridge when it strikes the vertical wall below the hinge. rad/s (d) Find the force (in kN) exerted by the hinge on the bridge immediately after the cable breaks. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction kN -Select--- (e) Find the force (in kN) exerted by the hinge on the bridge immediately before it strikes the wall. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction KN -Select---

Glencoe Physics: Principles and Problems, Student Edition
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter8: Rotational Motion
Section: Chapter Questions
Problem 75A
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--Select--- ---Select--- to the right to the left There is no horizontal component.
Transcribed Image Text:--Select--- ---Select--- to the right to the left There is no horizontal component.
A person on horseback is on a drawbridge which is at an angle = 20.0° above the horizontal, as shown in the figure. The center of mass of the person-horse system is d = 1.35 m from the end of the bridge. The bridge is l = 7.00 m long and has a mass of 2,300 kg. A cable is attached to the bridge 5.00 m from the frictionless hinge and to a point on the wall h = 12.0 m above the bridge. The mass of person plus horse is 1,100 kg. Assume the bridge is uniform. Suddenly (and most unfortunately for the horse and rider), the ledge where the bridge usually rests breaks off, and at the same moment the cable snaps and the bridge swings down until it hits the wall. (a) Find the angular acceleration (magnitude, in rad/s²) of the bridge once it starts to move. rad/s² (b) How long (in s) does the horse and rider stay in contact with the bridge while it swings downward? S (c) Find the angular speed (in rad/s) of the bridge when it strikes the vertical wall below the hinge. rad/s (d) Find the force (in kN) exerted by the hinge on the bridge immediately after the cable breaks. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction kN -Select--- (e) Find the force (in kN) exerted by the hinge on the bridge immediately before it strikes the wall. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction KN -Select---
Transcribed Image Text:A person on horseback is on a drawbridge which is at an angle = 20.0° above the horizontal, as shown in the figure. The center of mass of the person-horse system is d = 1.35 m from the end of the bridge. The bridge is l = 7.00 m long and has a mass of 2,300 kg. A cable is attached to the bridge 5.00 m from the frictionless hinge and to a point on the wall h = 12.0 m above the bridge. The mass of person plus horse is 1,100 kg. Assume the bridge is uniform. Suddenly (and most unfortunately for the horse and rider), the ledge where the bridge usually rests breaks off, and at the same moment the cable snaps and the bridge swings down until it hits the wall. (a) Find the angular acceleration (magnitude, in rad/s²) of the bridge once it starts to move. rad/s² (b) How long (in s) does the horse and rider stay in contact with the bridge while it swings downward? S (c) Find the angular speed (in rad/s) of the bridge when it strikes the vertical wall below the hinge. rad/s (d) Find the force (in kN) exerted by the hinge on the bridge immediately after the cable breaks. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction kN -Select--- (e) Find the force (in kN) exerted by the hinge on the bridge immediately before it strikes the wall. horizontal component: magnitude direction kN -Select--- vertical component: magnitude direction KN -Select---
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