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Elastic Moduli Free Doubts and Solutions

CBSE - XI Science - Physics - Mechanical Properties of Solids

Why spring shows wrong reading after a long use?

Asked by prasantaratha.lic 15th January 2017, 11:26 AM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

A rubber cord catapult has a cross sectional area 1mn2 and total unstretched length 10cm. It is stretched to 12cm and then released to project a missile of mass 5.0g Taking Y for rubber-5x108 N/m2 Find the velocity of projection of the projectile 

Asked by nilesh 6th February 2016, 11:00 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

can you please explain poisson's ratio with formula and how it is actually to be applied?

Asked by devyani.gauri99 28th December 2015, 9:40 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

Asked by BHAVYA PREETI 22nd January 2015, 2:23 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

a cuboidal solid of dimension 20 x 10 x 5 undergo volume distortion by force of 10 N. what is the stress and strain on it? 

Asked by BHAVYA PREETI 22nd January 2015, 10:07 AM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

What is the % of increase in the length of a wire of diametre 25mm stretched by a force of 100 Kg weight , The young's modulus of elasticity being 12.5 X 10^11 dyne/cm2 ??

Asked by gargpurvi85 21st January 2015, 8:42 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

if we break a solid why it is only solid?

Asked by me.deepak45 24th December 2014, 3:13 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

will the value of youngs modulus of steel and other such metals be given to us in the exam or do we have to learn it ?

Asked by arjun.srivastava15 13th December 2014, 8:12 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

A sphere of radius 10 cm is subjected to a pressure of 100 atm. Its volume decreases by 0.2 cc. Find its Bulk modulus.

Asked by Topperlearning User 25th July 2014, 9:49 AM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

Two wires A and B are of the same material. Their lengths are in the ratio 1 : 2 and the diameters in the ratio  2 : 1. If they are pulled by the same force, what will be the ratio of their increase in lengths?

Asked by Topperlearning User 25th July 2014, 9:16 AM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

(a)  What do you mean by modulus of rigidity? (b)  Which of the following state of matter has the least volume elasticity: solid, liquid or gas?

Asked by Topperlearning User 25th July 2014, 8:54 AM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

(a)  Define Young's modulus of a material. (b)  Define Bulk modulus of a body.

Asked by Topperlearning User 25th July 2014, 8:52 AM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

(i) Prove that the work done in stretching a wire = ½ x tension x extension. (ii) Prove that the work done per unit volume in stretching a wire for every type of strain = ½ x stress x strain.

Asked by Topperlearning User 24th July 2014, 4:55 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

Two wires, one of steel and the other of aluminium, each 2m long and of diameter 2.0 mm are joined end to end to form a composite wire of length 4.0 m. What tension in the  wire will produce a total extension of 0.90mm?  Y for steel = 2 x 1011 Nm-2; Y for aluminum = 7 x 1011Nm-2.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

A metal cube of side 10 cm is subjected to a shearing stress of 106 Nm-2.  Calculate the modulus of rigidity if the top of the cube is displaced by 0.05 cm with respect to its bottom.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

A wire 50 cm long and 1 sq.mm is cross-section has the Young's modulus, Y = 2 x 1010Nm-2. How much work is done in stretching the wire through 1 mm?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

(a)  Which is more elastic:  rubber or glass? Why? (b)  Identical springs of steel and copper are equally stretched.  On which spring, more work will have to be done?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

(a)  How does Young's modulus change with the rise of temperature? (b)  Is water more elastic than air? Why?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Mechanical Properties of Solids

What is the ratio of SI units to the CGS units of the modulus of rigidity?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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