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

Question : 1

A geostationary satellite

a) must move on an axis in the equatorial plane

b) must move about the polar axis

c) can move about any axis

d) both (b) and (c)

Question : 2

In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true ?

a) Gravitational force has a very short range.

b) Gravitational force is attractive only, whereas the electric and the magnetic forces are attractive as well as repulsive.

c) Gravitational force is stronger than the other two.

d) Gravitational force is a long range force, while the other two are short range forces.

Question : 3

An artificial satellite orbiting the earth does not fall down because the earth’s attraction

a) is balanced by the viscous drag produced by the atmosphere

b) vanishes at such distances

c) is balanced by the attraction of the moon

d) produces the necessary acceleration of its motion in a curved path

Question : 4 [NDA]

A block of ice is floating in a beaker containing liquid of specific gravity greater than one. When ice melts completely what happens to the level of liquid in the beaker?

a) It will rise up

b) It will go down

c) It will remain the same as before

d) It may or may not change depending upon size of beaker

Question : 5

Which one among the following is the correct value of the gravitational force of the Earth acting on a body of mass 1 kg?

a) 89 N

b) 9. 8 N

c) 8. 9 N

d) 98 N