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Questions >> JEEMAIN and NEET >> Physics >> Class11 >> Mechanical Properties of Solids

2 wires of radius in ratio 1 : 2 have young modulus in ratio 2 : 3.Equal force is applied on them ,what is the ratio of elastic potential energy

asked May 8, 2014 by sreemathi.v

1 answer

Calculate the increase in energy of steel rod of 2m and crosssectional area $4cm^2$ ,when a 500N force is applied on it. $Y_{steel}=2\times 10^{11}N/m^2$

asked May 8, 2014 by sreemathi.v

1 answer

If a force F displace 0.25cm with respect to bottom.What is F if modulus of rigidity is $5\times 10^5$ .

asked May 8, 2014 by sreemathi.v

1 answer

Calculate the % change on volume is bulk modulus of water is $2\times 10^9N/m^2$ and average depth of sea is 4000m,take $g=10m/s^2$ .

asked May 8, 2014 by sreemathi.v

1 answer

What is change in volume in cc of 5cc of water at surface taken to the bottom of the lake 50m deep,given volume elasticity is $20\times 10^3$ atm

asked May 8, 2014 by sreemathi.v

1 answer

A sphere contracts in volume by 0.05% which taken to the bottom of sea 500m deep.Find bulk modulus of sphere.

asked May 8, 2014 by sreemathi.v

1 answer

Elastic and plastic regions are respectively

asked May 8, 2014 by sreemathi.v

1 answer

Two rods of equal length are in parallel with area in the ratio 3 : 4 and young modulus in the ratio 5 : 3.The ratio of force on the rods is

asked May 8, 2014 by sreemathi.v

1 answer

Two wires A and B of equal cross sectional area are in series,stretches equally is $Y_A=3\times 10^{11}$ and $Y_B=1.8\times 10^{11}$ .What is ratio of their length?

asked May 7, 2014 by sreemathi.v

1 answer

Calculate elongation if $l_{steel}=2m$ and $l_{brass}=1.5m$ , $a_{steel}=2mm^2$ and $a_{brass}=5mm^2$ , $Y_{steel}=2\times 10^{11}N/m^2$ and $Y_{brass}=1\times 10^{11}N/m^2$ .

asked May 7, 2014 by sreemathi.v

1 answer

Two steel wire are hang from roof.Their length and radius are in the ratio 3 : 5 and 1 : 2 respectively.If the extension in first wire is 2mm,what is extension in other if force applied is in the ratio 2 : 3?

asked May 7, 2014 by sreemathi.v

1 answer

A mass of 1kg is attached to the end of a rubber string 25cm long having radius 2mm,which is rotating in horizontal plane in a radius of 28cm with 50rpm.What is young modulus of string in $N/m^2$

asked May 7, 2014 by sreemathi.v

1 answer

A wire of r=1cm consist of 1m steel and 2m copper respectively.Total extension when a force applied is 1mm.Find the force is $Y_{cu}=1.1\times 10^{11}N/m^2,Y_{steel}=2\times 10^{11}N/m^2$ .

asked May 7, 2014 by sreemathi.v

1 answer

2 wire of length 1 : 2 and area in the ratio 2 : 1 is applied with equal force stretch equally .Find the ratio of modulus of rigidity

asked May 7, 2014 by sreemathi.v

1 answer

The breaking stress of aluminium is $7\times 10^7N/m^2$ .Find the maximum length of wire that can be hang with out breaking if density of aluminium is $3\times 10^3Kgm^{-3}$

asked May 7, 2014 by sreemathi.v

1 answer

Calculate change in volume percentage if we apply a pressure of 50atm on a material of Bulk modulus $2\times 10^{11}N/m^2$ .

asked May 7, 2014 by sreemathi.v

1 answer

If $Y_{Steel}=2\times 10^{11}N/m^2$ ,what force must be applied to steel rod of $l=2m$ and $r=2mm$ to stretch it by 1mm

asked May 7, 2014 by sreemathi.v

1 answer

Among rubber and steel which is more elastic

asked May 7, 2014 by sreemathi.v

1 answer

Each side of a cube is decreased by 2% when a pressure of $3\times 10^6N/m^2$ is applied.What is bulk modulus of cube.

asked May 7, 2014 by sreemathi.v

1 answer

A 50KN force is applied on a table,the length of four legs of table is 2m each and of radius 5cm.If young modulus of material of table is $5\times 10^{10}N/m^2$ .Find the decrease in length in a leg of table.

asked May 7, 2014 by sreemathi.v

1 answer

A steel rod of r=30mm and length 3m.A 50 KN force is applied along its length.Calculate the change in length is $Y=2\times 10^{11}N/m^2$

asked May 7, 2014 by sreemathi.v

1 answer

A steel wire of 8m in length is stretched by 1mm of cross sectional area $2mmm^2$ .If young modulus of steel is $2\times 10^{11}N/m^2$ .What is elastic potential energy?

asked May 7, 2014 by sreemathi.v

1 answer

A 3cm cube has its upper face displaced by 0.1cm by a tangential force.If modulus of rigidity of material is $5\times 10^4N/m^2$ .Find the force

asked May 7, 2014 by sreemathi.v

1 answer

If 5litre of ideal gas is compressed isothermally at 800mm Hg to 2 litre.Find its stress?

asked May 7, 2014 by sreemathi.v

1 answer

If we increases the pressure by 20atm on a sphere which is made up of material of bulkmodulus $5.2\times 10^{10}N/m^2$ ,what is change in volume percentage?

asked May 7, 2014 by sreemathi.v

1 answer

Two wires of same material have radius in the ratio 2 : 1 and length in the ratio 1 : 2.If equal force is applied on them then ratio of stress is

asked May 7, 2014 by sreemathi.v

1 answer

A steel wire of l=15m and r=1mm is stretched by a unknown force F.If young modulus of steel wire is $2.4\times 10^{11}N/m^2$ and change in length is $5\times 10^{-2}mm$

asked May 7, 2014 by sreemathi.v

1 answer

A cylindrical vessel filled upto a height at the bottom of the vessel. Area of hole is $\bigg(\large\frac{1}{100}\bigg)$ that of the area of vessel is maintained at 2 m . What is the time required to empty water equal to volume of water initially present in the vessel.

asked Oct 8, 2013 by meena.p

1 answer

A body floats on mercury with $\large\frac{1}{3}$ of its volume below the surface. Another liquid of density $\large\frac{1}{10}$ that of mercury is poured on top to cover the body completely. What is the fraction of cube now immersed.

asked Oct 8, 2013 by meena.p

1 answer

A ball of density $0.5 \times 10^3$ is dropped from a height of $10\; m$ and then enters water . Upto what depth will the ball go inside the water before it starts raising up.

asked Oct 8, 2013 by meena.p

1 answer

To what depth, relative to the surface does mercury dip down in a capillary tube of radius $1.0 mm$ surface tension $T=0.5 N/m$ density of mercury $=13.6 \times 10^{3}\;kg/m^3$ $\;g=9.8 m/s^2$

asked Oct 8, 2013 by meena.p

1 answer

A tank of diameter $0.6 \;m$ and height $1\;m$ has a hole at of diameter $10\;mm$ at a depth of $0.6\;m$ from the free surface. What is the thrust force due to the water issuing from the hole. $(g=10m/s^2)$

asked Oct 8, 2013 by meena.p

1 answer

The energy released when $1000$ small drops each of radius $10^{-7}\;m$ coalesce to from a single big drop is (Surface tension of liquid is $14 \times 10^{-2}\;N/m$ )

asked Oct 8, 2013 by meena.p

1 answer

A solid blocks whose density is greater then the density of liquid is placed inside the liquid. It begins to float. Now a string attached to the solid holds the solid submerged. Now the tension in the string is $T_1$ . If the system is accelerated upward with an acceleration a how will the tension in the string change.

asked Oct 8, 2013 by meena.p

1 answer

A hydraulic press has a load F placed on the larger piston which is balanced by a smaller piston where a load of $20\;kg$ is kept. (neglecting mass of position) The larger piston has a diameter of $0.35\;m$ and the smaller piston has diameter of $0.1\;m$ The press is filled with oil of density $750\;kg/m^3$ and the larger position is at a height $1.5\;m$ relative to smaller piston. Find F.

asked Oct 8, 2013 by meena.p

1 answer

Two wires of different materials are used to hang a rod horizontally tied from two ends of the rod of length $2m$ . At what distance should a weight be hung on the rod from Wire-1 so that equal stresses are produced on both the wires. Wire 1: cross -sectional area $= 10^{-3}m^{2}$ . Young's modulus $= 2 \times 10^{11} N/m^2$ Wire 2 : cross -sectional area $= 2 \times 10^{-3} m^{2}$ . Young's modulus $= 1 \times 10^{11} N/m^2$

asked Oct 7, 2013 by meena.p

1 answer

A object of mass $5.0\;g$ is projected into air using a rubber string of cross sectional area of $1;mm^2$ . The length of the chord when it was unstretched is 10.0 cm. It is then stretched to 12 cm to project the object . The young's modulus of rubber is $5.0 \times 10^8 n/m^2$ . The velocity of projectile is (assuming all the energy of string is transferred to projectile)

asked Oct 7, 2013 by meena.p

1 answer

A highly rigid cubical block A of small mass M and side L is fixed rigidly to another cubical block B of the same dimensions and modulus of rigidity $\eta$ Such that the lower face of A completely covers the upper face of B. The lower face of B is rigidly held on horizontal surface. A small force is applied perpendicular to one of the side face of A. After the force is withdrawn block A executes small oscillations the time period of which is given by

asked Oct 7, 2013 by meena.p

1 answer

If $\rho$ is density of the material of a wire and $\sigma$ is the breaking stress. The greatest length of wire that can hang freely without breaking is

asked Oct 7, 2013 by meena.p

1 answer

Siphon is a device to transfer liquid from a higher level to lower level. The condition of working of siphon is

asked Oct 7, 2013 by meena.p

1 answer

If the ratio of lengths , radii and Young's modulli of two wires in the figure shown are 2,4, and 1 respectively. Then the corresponding ratio of increase in their length will be

asked Oct 7, 2013 by meena.p

1 answer

In the arrangement shown in figure $\large\frac{m_A}{m_B}=\frac{2}{3}$ and ratio of density of block B and of the liquid is $2:1$ The system is released from resat. Then

asked Oct 7, 2013 by meena.p

1 answer

Power required to raise $300 liters$ of water per minute through a height of 6m using a pipe of diameter 2.4 cm is $(g=10 m/s^2)$

asked Oct 4, 2013 by meena.p

1 answer

A wooden cube is floating in water when a mass $m= 0.2\;kg$ is kept on its top, When the mass is removed the cube rises by $2 \;cm$ . The side of the cube is [density of water $=10^3 kg/m^3$ ]

asked Oct 4, 2013 by meena.p

1 answer

A rubber balloon has $200\;g$ water in it . It's weight in water will be (neglecting the weight of balloon)

asked Oct 4, 2013 by meena.p

1 answer

When at rest a liquid stands at same level in the tubes shown . But as indicated a height difference of 'h' occurs when the system is given an acceleration towards right. then 'h' equals

asked Oct 4, 2013 by meena.p

1 answer

Two liquids which do not react chemically are placed in a bent tube as shown. The heights of liquids above their surface of separation (Common surface) are

asked Oct 4, 2013 by meena.p

1 answer

A uniform rod of length $2.0 m$ specific $0.5$ and mass $2 \;kg$ is hinged at one end to bottom of tank of water (Specific gravity =1.0) filled upto a height of $1m$ . as shown when $\theta \neq 0$ . the force exerted by hinge on the rod is $(g=10 \;m/s^2)$

asked Oct 4, 2013 by meena.p

1 answer

A barometer tube reads $76\;cm$ of mercury. If the tube in gradually inclined at an angle of $60^{\circ}$ with vertical , keeping the open end immersed , in mercury reservoir, the length of the mercury column will be

asked Oct 4, 2013 by meena.p

1 answer

In a baro meter as shown in the figure a small hole is made at a point S Density of mercury is $\rho$ . The mercury comes out from this hole with speed v equal to

asked Oct 4, 2013 by meena.p

1 answer

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