May 2022
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May 23, 2022
The escape velocity from earth is ves. A body is projected with velocity 2 ves with what constant velocity will it...
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May 23, 2022
A planet has twice the radius but the mean density is 1/4 th as compared to earth. What is the...
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May 23, 2022
The acceleration due to gravity on a planet is same as that on earth and its radius is four times...
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May 23, 2022
The escape velocity for a body of mass 1 kg from the earth surface is 11.2 kms-1 The escape velocity...
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May 23, 2022
The escape velocity for the earth is ve . The escape velocity for a planet whose radius is four times...
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May 23, 2022
The radius of a planet is 1/4 of earth’s radius and its acceleration due to gravity is double that of...
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May 23, 2022
The escape velocity of a body on an imaginary planet which is thrice the radius of the earth and double...
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May 23, 2022
A mass of 6 × 1024 kg is to be compressed in a sphere in such a way that the escape...
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May 23, 2022
Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the...
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May 23, 2022
A steel ring of radius r and cross-section area ‘A’ is fitted on to a wooden disc of radius R(R>r)....
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May 23, 2022
The force required to stretch a steel wire of cross-section 1 cm2 to 1.1 times its length would be(Y=2×1011 N/m2) (a) 2×106...
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May 23, 2022
In steel, the Young’s modulus and the strain at the breaking point are 2×1011 N/m2 and 0.15 respectively. The stress at...
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May 23, 2022
Poly – β – hydroxybutyrate – co – β hydroxyvalerate is (PHBV) is a copolymer of a. 3 – hydroxbutanoic...
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May 23, 2022
The ratio of the radii of planets A and B is k1 and ratio of acceleration due to gravity on...
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May 23, 2022
How many times is escape velocity ( Ve ) , of orbital velocity (V0 )for a satellite revolving near earth (a)...
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May 23, 2022
The least velocity required to throw a body away from the surface of a planet so that it may not...
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May 23, 2022
Young’s modulus of rubber is 104 N/m2 and area of cross-section is 2 cm2 . If force of 2×105 dynes...
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May 23, 2022
For silver, Young’s modulus is 7.25×1010 N/m2 and Bulk modulus is 11×1010 N/m. Its Poisson’s ratio will be (a) –...
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May 23, 2022
The length of a wire is 1.0 m and the area of cross-section is 1.0×10-2 cm2 . If the work...
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May 23, 2022
46.A force of 200 N is applied at one end of a wire of length 2 m and having area...
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May 23, 2022
A ball of radius 11 cm and mass 8 kg rolls from rest down a ramp of length 2m. The...
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May 23, 2022
40. The interatomic distance for a metal is 3×10-10 m . If the interatomic force constant is 3.6×10–9 N/Å ,...
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May 23, 2022
Longitudinal stress of 1 kg/mm2 is applied on a wire. The percentage increase in length is (Y=1011 N/m2) (a) 0.002 ...
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May 23, 2022
How much energy will be necessary for making a body of 500 kg escape from the earth [g=9.8 m/s2 ,...
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May 23, 2022
33. An aluminum rod (Young’s modulus=7×109 N/m2) has a breaking strain of 0.2%. The minimum cross-sectional area of the rod...
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May 23, 2022
A ring takes time t1 in slipping down an inclined plane of length L and takes time t2 in rolling...
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May 23, 2022
A hollow cylinder is rolling on an inclined plane, inclined at an angle of 30° to the horizontal. Its speed...
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May 23, 2022
v e and vp denotes the escape velocity from the earth and another planet having twice the radius and the...
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May 23, 2022
Solid cylinders of radii r1,r2,r3 and roll down an inclined plane from the same place simultaneously. If , r1>r2>r3 which...
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May 23, 2022
An inclined plane makes an angle of 30° with the horizontal. A solid sphere rolling down this inclined plane from...
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May 23, 2022
A body rotating at 20 rad/sec is acted upon by a constant torque providing it a deceleration of 2 rad/sec2....
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May 23, 2022
32. A rod of length l and area of cross-section A is heated from 0°C to 100°C. The rod is...
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May 23, 2022
31.The temperature of a wire of length 1 metre and area of cross-section is 1 cm2 is increased from 0°C...
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May 23, 2022
30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is...
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May 23, 2022
29. An area of cross-section of rubber string is 2 cm2 . Its length is doubled when stretched with a...
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May 23, 2022
28. Steel and copper wires of same length are stretched by the same weight one after the other. Young’s modulus...
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May 23, 2022
27. Why the spring is made up of steel in comparison of copper (a) Copper is more costly than steel...
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May 23, 2022
26.Two wires of equal lengths are made of the same material. Wire A has a diameter that is twice as...
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May 23, 2022
25. The spring balance does not read properly after its long use, because (a) The elasticity of spring increases (b) ...