University:
University of Greenwich
Course:
BSC152 | Engineering Physics
Academic year:

2021
Views:

168

Pages:

3
Author:

Jesly V

FEIL TION whenever a body mwes 07 tends to move surface of another body, a force over comes istor I. parallel to the surface of contact play which acts and opposers is called frection opporsing foxe When two bodies are placed in contact, attractive fores act between their partides at the surface. of confact, contact force as a on result each body excite. the other. a The component of the to the contact surface contact normal reaction N. The the contact surface is normalachen AN force, F nomel normal force component parallel called friction. cert force to friction Stakic Friction The force of frection which between two bodies before starti moving over comes isto play one body actually the other called static friction. As the applied force encreased an the surface is fs also increases. increased Once a the applied force certaco limet maximum The's called and the do beyond the static friction a object just begins of static friction value of lomiting friction Clearly, fo fs fs man. (fs max) to is The limiting friction is directly proportion to the normal reaction N btes the two surfaces fe mare fs max = Ms N, where us i's a constan of proportionakty and is Enown as co offreient of static fpection when over a body is a state of steady motion the surface of another body a kinematic friction called kinematic friction is also proportional to the normal reaction ~ 6tew the two surfaces on confact fk = Mk k, where My called co-efficient of kinematic friction Centripefal Accelaration. A body undergoing a uniform circular moten