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

Question : 11 [SSC CGL]

If the moon is to escape from the gravitational field of the earth forever, it will require a velocity

a) slightly more than 111.2 km/s

b) less than

c) 11.2 km/s

d) 22.4 km/s

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Question : 12 [CDS]

Raw mangoes shrivel when pickled in brine. The phenomenon is associated with

a) increase of surface tension of fluid

b) reverse osmosis

c) osmosis

d) decrease of surface tension of fluid

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Question : 13

Consider a satellite going round the earth in a circular orbit. Which of the following statements is wrong?

a) It is acted upon by a force directed away from the centre of the earth which counter-balances the gravitational pull.

b) It is moving with constant speed

c) It is a freely falling body.

d) It is an accelerated motion

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Question : 14 [NDA]

A body weighs 5 kg on equator. At the poles it is likely to weight

a) 0 kg

b) less than 5 kg but not zero

c) 5 kg

d) more than 5 kg

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Question : 15 [IAS Prelim]

A liquid is flowing in a streamlined manner through a cylindrical pipe. Along a section containing the axis of the pipe, the flow profile will be : (a) (b) (c) (d)

a)

b)

c)

d)

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