force of gravity, solids and fluids - Category wise Question and Answer Practice Test with Solutions

Question : 6

A spring balance is graduated on sea level. A body of mass 1 kg is weighed at consecutively increasing heights from the earth’s surface, then what would be the weight indicated by the balance?

a) Weight will remain same

b) Weight will go on decreasing continuously

c) Weight will go on increasing continuously

d) Weight will first increase and then decreases

Question : 7 [NDA]

Flow velocities in an incompressible fluid can be measured with which one of the following?

a) Strain gauge

b) Venturi tube

c) Barometer

d) Manometer

Question : 8

Two objects of different masses falling freely near the surface of moon would

a) experience forces of same magnitude

b) have different accelerations

c) have same velocities at any instant

d) undergo a change in their inertia

Question : 9 [NDA]

Assertion (A) :
With the increase of temperature, the viscosity of glycerine increases.
Reason (R) :
Rise of temperature increases kinetic energy of molecules.

a) A is true but R is false

b) Both A and R are true but R is not a correct explanation of A

c) Both A and R are true and R is the correct explanation of A

d) A is false but R is true

Question : 10 [NDA]

Why do two ice blocks join to form one block when pressed together?

a) Melting point of ice remains unchanged with increase in pressure

b) Melting point of ice increases with increase in pressure

c) Melting point of ice is lowered with increase in pressure

d) Melting point of ice is 0°C