Tuesday, October 23, 2007

Study guide H C Verma JEE Physics Ch. 6 FRICTION

JEE Syllabus

Static and dynamic friction;
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Sections of the chapter

6.1 Friction as the component of contact force
6.2 Kinetic friction
6.3 Static friction
6.4 Laws of friction
6.5 Understandng friction at atomic level
6.6 A Laboratory method to measure friction coefficient

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Study Plan

Day 1

6.1 Friction as the component of contact force
Example 6.1
6.2 Kinetic friction
Example 6.2

Day 2

6.3 Static friction
Ex. 6.3
W.O.E. 1,2,3,4

Day 3
6.4 Laws of friction
W.O.E. 5 to 8

Day 4

6.5 Understandng friction at atomic level
6.6 A Laboratory method to measure friction coefficient
Ex. 6.4
W.O.E. 9,10

Day 5

Objective I

Day 6

Objective II

Day 7

Exercises 1 to 5

Day 8

Exercises 6 to 10

Day 9

Exercises 11 to 15

Day 10

Exercises 16 to 20

Revision Period

Day 11

Exercises 21 to 23

Day 12

Exercises 24 to 27

Day 13

Exercises 28 to 30

Day 14

Exercises 31,

Day 15

Questions for Short Answer: 1 to 11






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web sites
lecture notes
http://plasma4.sr.unh.edu/ng/phys407/phys407-6-27-05.pdf


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JEE question 2007 paper I

STATEMENT-1

A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between the block and the surface after moving through a certain distance. The surface is now tilted to an angle of 30 degrees with the horizontal and the same block is made to go up on the surface with the same initial velocity v. The decrease in the mechanical energy in the second situation is smaller than that in the first situation.

because

STATEMENT-2

The coefficient of friction between the block and the surface decreases with the increase in the angle of inclination.

(A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
(B) Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True


Correct choice: (C)

Coefficient of friction doesn’t depend on the angle of inclination of the plane.

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