Form the figure shown, a flexible belt placed around a rotating drum of 4-inch radius acts as a brake when the arm ABCD is pulled down by the force P. The coefficient of kinetic friction between the belt and the drum is 0.7. What force P that would result in a braking torque of 400 lb • in., assuming that the drum is rotating counterclockwise. Neglect the weight of the brake arm. 60° 4 in. 60° A B -2 im. in.-in.- in.-- 2 4 D
Form the figure shown, a flexible belt placed around a rotating drum of 4-inch radius acts as a brake when the arm ABCD is pulled down by the force P. The coefficient of kinetic friction between the belt and the drum is 0.7. What force P that would result in a braking torque of 400 lb • in., assuming that the drum is rotating counterclockwise. Neglect the weight of the brake arm. 60° 4 in. 60° A B -2 im. in.-in.- in.-- 2 4 D
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Transcribed Image Text:Problem#2:
Form the figure shown, a flexible belt placed
around a rotating drum of 4-inch radius
acts as a brake when the arm ABCD is pulled
down by the force P. The coefficient
of kinetic friction between the belt and the
drum is 0.7. What force P that
would result in a braking torque of 400 lb • in.,
assuming that the drum is rotating
counterclockwise. Neglect the weight of the
brake arm.
60°
A
-2 in.
4 in..
B
4 in.
60°
-2 in.
D
P
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