Mechanical Properties of Solid Quiz 2 – Punjab Meritorious School Preparation Portal

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The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2 then the viscous force acting on the ball will be

2 Mg

Mg/2

3/2 Mg

A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is

The cylindrical tube of a spray pump has radius, R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is:

In rising from the bottom of a lake, to the top, the temperature of an air bubble remains unchanged, but its diameter gets doubled. If h is the barometric height (expressed in m of mercury of relative density p) at the surface of the lake, the depth of the lake is

8 ph m

7ph m

9 ph m

12 ph m

Two non-mixing liquids of densities p and np (n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length pL (p < 1) in the denser liquid. The density d is equal to:

{1 + (n + 1) p}p

{2 + (n + 1) p}p

{2 + (n - 1) p} p

{1 + (n - 1) p} p

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