Mechanics and Properties of Matter Quiz TNPSC Group 1, 2, 2a, 4, VAO - 2

Question: 6

The unit of surface tension is

(A) Nm^-2

(B) Kg m^-1

(C) N^-1 m

(D) Nm^-1

Question: 7

The principle used in the centrifuges is

(A) Force

(B) Gravitational force

(C) Centripetal force

(D) Centrifugal force

Question: 8

Rain drops assume spherical shape due to

(A) Centripetal force

(B) Surface tension

(C) Centrifugal force

(D) Gravitational force

Question: 9

The formula to calculate centripetal force is

(A) F = ma

(B) F = mg

(C) F = mv²/r

(D) F = mv/r²