26. (II) A person exerts a horizontal force of 42 N on the end of a door 96 cm wide. What is the magnitude of the torque if the force is exerted (a) perpendicular to the door and (b) at a 60.0° angle to the face of the door?

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter10: Rotational Motion
Section: Chapter Questions
Problem 41P: A potters wheela thick stone disk of radius 0.500 in and mass 100 kgis freely rotating at 50.0...
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Question 26 Only part A
shown in Fig. 8-42. Assume that a friction torque of
25. (II) Calculate the net torque about the axle of the wheel
(b) How could she
xért more torque?
exerts?
0.60 m·N opposes the motion.
35 N
28 N
8-5
30.
135
31.
12 cm
24 cm
olod
18 N
32
FIGURE 8-42 Problem 25.
26. (II) A person exerts a horizontal force of 42 N on the end
of a door 96 cm wide. What is the magnitude of the torque
if the force is exerted (a) perpendicular to the door and
(b) at a 60.0° angle to the face of the door?
27. (II) Two blocks, each of mass m, are attached to the ends
of a massless rod which pivots as shown in Fig. 8-43.
Initially the rod is held in the horizontal position and then
released. Calculate the magnitude and direction of the
net torque on this system when it is first released.
m
Tabold
FIGURE 8-43 Problem 27.
1nguire
Transcribed Image Text:shown in Fig. 8-42. Assume that a friction torque of 25. (II) Calculate the net torque about the axle of the wheel (b) How could she xért more torque? exerts? 0.60 m·N opposes the motion. 35 N 28 N 8-5 30. 135 31. 12 cm 24 cm olod 18 N 32 FIGURE 8-42 Problem 25. 26. (II) A person exerts a horizontal force of 42 N on the end of a door 96 cm wide. What is the magnitude of the torque if the force is exerted (a) perpendicular to the door and (b) at a 60.0° angle to the face of the door? 27. (II) Two blocks, each of mass m, are attached to the ends of a massless rod which pivots as shown in Fig. 8-43. Initially the rod is held in the horizontal position and then released. Calculate the magnitude and direction of the net torque on this system when it is first released. m Tabold FIGURE 8-43 Problem 27. 1nguire
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