FREE Trial

A 20-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the

Question:

A 20-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block are µs = 0.8 and µk = 0.6. A horizontal string is attached to the block and a constant tension T is maintained in the string. What is the force of friction acting on the block if

(a) T = 15 N or

(b) T=20N.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Answer rating: 70% (10 reviews)

a s mg 15 then f f s ...View the full answer


answer-question-section
Answered By
tutor-profile-image
Munir Ahmed Jakhro
I am professional Tutor of of Business Courses, I did my four years Bachelor Degree from one of the Top Business schools of World "Institute of Business Administration" in year 2013. Since then I have been working as Tutor of Accounting, Finance tutor on different online platforms like this website. I am have experience of 6 years teaching business courses to students online and offline my professional job at national savings also helped me in accounting understanding .
4.90+ 8+ Reviews 10+ Question Solved
Related Book For  book-img-for-question
Fundamentals of Ethics for Scientists and Engineers

Fundamentals of Ethics for Scientists and Engineers

ISBN: 978-0195134889

1st Edition

Authors: Edmund G. Seebauer, Robert L. Barry

See More Books
Question Posted:
See More Questions

Related Video

Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.

Students also viewed these Mechanics questions

Essential Management Approaches And Practices For Line And HR Leaders In Turbulent Times 1st Edition - ISBN: B0C6R8XVT1 - Free Book