Answered: A block brake is used to stop a drum of…

A block brake is used to stop a drum of 400 mm diameter. The contact angle is 90°. The coefficient of friction is 0.3. The force of 350 N is applied at the end of the lever as shown in Figure 5.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.58P: The screw of the carjack has a pitch of 0.1 in. and a mean radius of 0.175 in. Note that the ends of...

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

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A block brake is used to stop a drum of 400 mm diameter. The
contact angle is 90°. The coefficient of friction is 0.3. The force of
350 N is applied at the end of the lever as shown in Figure 5.
150 130
350N
08
.06
Figure 5: The block brake
6.1.
Demonstrate all forces acting on a brake.
6.2.
Determine the normal force exerted by the block on the drum.
6.3. Calculate the tangential braking force.
6.4. Calculate the braking torque.

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