24. (I) A 52-kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm. (a) What is the maximum torque she exerts? (b) How could she exert more torque?
24. (I) A 52-kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm. (a) What is the maximum torque she exerts? (b) How could she exert more torque?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:### Problem 24:
(I) A 52-kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm.
(a) What is the maximum torque she exerts?
(b) How could she exert more torque?
### Problem 25:
(II) Calculate the net torque about the axle of the wheel shown in **Figure 8–42**. Assume that a friction torque of 0.60 m·N opposes the motion.
#### Explanation of **Figure 8–42**:
The diagram displays a wheel with two concentric circles. The outer circle has a radius of 24 cm, and the inner circle has a radius of 12 cm. There are three forces acting on the wheel:
- A 35 N force directed at a 135° angle relative to the horizontal.
- A 28 N force directed vertically upwards.
- An 18 N force directed horizontally to the left.
The illustration depicts how these forces are applied at different points, affecting the torque calculations around the wheel's axle.
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