Posted by michelle on Friday, November 30, 2012 at 12:16pm.
A hydraulic brake system is shown. The
area of the piston in the master cylinder is 6.32 cm^2, and the area of the piston in the brake cylinder is 1.83 cm^2. The coeﬃcient of kinetic friction between the brake shoe and the wheel drum is 0.443.
How large is the frictional force between the brake shoe and the wheel drum when a force of 49 N is exerted on the pedal? Answer in units of N.

physics  Elena, Friday, November 30, 2012 at 12:36pm
Pascal’s principle F1/A1=F2/A2.
F(bc)={A(bc)/A(mc)}•F(pedal) =
=(1.83/6.32) •49 =14.2 N
This is the normal force exerted on the brake shoe.
The frictional force is
F(fr) =μ F(bc)=0.442•14.2 =6.3 N

physics  michelle, Friday, November 30, 2012 at 12:41pm
Wow thank you so much! This problem has been bothering me for a week now
Answer This Question
Related Questions
 college physics  A hydraulic brake system is shown. The area of the piston in ...
 Physics  A car's brake system transfers pressure from the main cylinder to the...
 physics  The drawing shows a hydraulic system used with disc brakes. The force ...
 Physics HELP!!!!!!!!  Suppose a monatomic ideal gas is contained within a ...
 Physics  If you have a hydraulic lift and you know the density of the oil ...
 Physics  When a driver brakes an automobile, the friction between the brake ...
 Physics  Suppose a monatomic ideal gas is contained within a vertical cylinder ...
 Physics  Suppose a monatomic ideal gas is contained within a vertical cylinder ...
 Physics  The coil in the figure below contains 425 turns and has an area per ...
 Physics  The coil in the figure below contains 425 turns and has an area per ...
More Related Questions