# Mechanics and Properties of Matter TNPSC Group 1 Questions

## Mechanics and Properties of Matter MCQ Questions

7.

Analyse the statements and choose the correct answer:

Assertion (A): A particle moves along a circle.

Resertion (R-I ): speed is uniform.

(R-II ): Velocity is changing

A.

R-I is correct, R-II is wrong

B.

R-I is wrong R-II is correct

C.

R-I and R-II are wrong

D.

Both are correct

D. Both are correct

8.
A girl is swinging on a swing in sitting position. When the same girl stands up, the period of swing will
A.
be shorter
B.
be longer
C.
depend on the height of the girl
D.
not change
A. be shorter
9.
A simple machine helps a person doing
A.
less work
B.
the same amount of work with lesser force
C.
the same amount of work
D.
the same amount of work much faster
B. the same amount of work with lesser force
10.
The normal boiling point of a liquid is the temperature at which
A.
the vapour pressure of the liquid is zero
B.
the vapour pressure of the liquid is standard pressure
C.
the density of the liquid is unity
D.
the vapour pressure of the liquid is equal to the atmospheric pressure
D. the vapour pressure of the liquid is equal to the atmospheric pressure
11.

the density of pure water will be

A.

maximum at 40C

B.

minimum at 40C

C.

maximum at 00C

D.

minimum at 00C

A. maximum at 40C

12.
If the depth of floatation of a ship changes when it sails from the Arabian sea to the Indian ocean, it is due to
A.
Changes to pressure
B.
change it weight of the slip
C.
change In direction
D.
change in density of sea-water  