ALAGAPPA UNIVERSITY
KARAIKUDI – 630 003
UNIT BASED ONLINE EXTERNAL EXAMINATION - NOVEMBER – 2020

FIRST SEMESTER SLOT – I

MECHANICS AND RELATIVITY - 7BPH1C2

Total Marks: 25 Time: 1.0 Hr

SECTION A – SHORT ANSWER - 5 x 2 = 10 Marks

ANSWER ALL THE QUESTIONS

1. Define center of gravity.

2. What is cone of friction?

3. What is limiting friction?

4. Define angle of friction.

5. Define coefficient of friction.

SECTION B - DESCRIPTIVE - 3 x 5 = 15 Marks

ANSWER ANY THREE

6. Derive an expression for the center of gravity of a hollow hemisphere.

7. Derive an expression for the center of gravity of a solid hemisphere.

8. State laws of friction.

9. Write a note on friction clutch.

10. Derive an expression for the center of gravity of a hollow right solid cone.