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THIRD SEMESTER (CUCBCSS—UG) DEGREE EXAMINATION
NOVEMBER 2020
Physics/Applied Physics
PHY 3B O3/APY 3B 038--MECHANICS

Time Three Hours Maximum : 80 Marks

Section A

Answer all questions.
Kach question carries 1 mark.
Answer in a word or phrase.

1. A particle in uniform rectilinear motion corresponds to a straight world line. The relative position

of one event with respect to another would be represented by ‏لماع‎
‎2. A particle of ——--—--—-_ mass travels with the speed of light.

3. Work energy theorem is given by —————----.

4. The configuration of the system of N particles, moving freely in space, may be represented by the
position of a single point in 3N dimensional space, which ലി --................... --

ಲಾ

The relation represents variation of mass with velocity is ——
6. An inertial frame attached with the centre of mass of an isolated system of particles is called
1 ‏سسسسهے شس‎ ,
7. Constraints are always related to forces which restrict the motion of the system. These forces are
called -- ‏سس‎
‎True or False :
8. Lagragian equations are invariant under Galilean transformation,

9. Jt is impossible to perform an experiment which will measure the state of uniform velocity of a

system by observations, confined to that system,

10. All the Jaws of physics have the same form in all non inertial systems.

(10 x 1 = 10 marks)

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