he block brake consists of a pin-connected lever and friction block at BB. The coefficient of static friction between the wheel and the lever is μsμs = 0.3, and a torque of 5 N⋅mN⋅m is applied to the wheel. Determine if the brake can hold the wheel stationary when the force applied to the lever is (a) PP = 30 NN, (b)  PP = 70 NN.   Draw the free-body diagram of the wheel. Draw the vectors starting at the black dots. The location and orientation of the vectors.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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The block brake consists of a pin-connected lever and friction block at BB. The coefficient of static friction between the wheel and the lever is μsμs = 0.3, and a torque of 5 N⋅mN⋅m is applied to the wheel. Determine if the brake can hold the wheel stationary when the force applied to the lever is (a) PP = 30 NN, (b)  PP = 70 NN.
 
Draw the free-body diagram of the wheel.
Draw the vectors starting at the black dots. The location and orientation of the vectors.
 
Vectors:
FR Frictional force at point B
NB Normal force at point B
O, Reaction at point O, vertical component
5 N-m
O, Reaction at point O, horizontal component
150 mm
50 mm
B.
200 mm
400 mm
Transcribed Image Text:Vectors: FR Frictional force at point B NB Normal force at point B O, Reaction at point O, vertical component 5 N-m O, Reaction at point O, horizontal component 150 mm 50 mm B. 200 mm 400 mm
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