Elastic potential energy stored per unit volume
u ½ stress × strain = ½ × stress × stressY
= S22Y.
-Answered by Shruti Srivastva On 21 September 2020:05:33:22 PM
Question 1. Asked on :21 September 2020:05:30:48 PM
If S is the stress and Y is young's modulus of the material of a wire, what is the energy stored in the wire pere unit volume in terms of S and Y?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Elastic potential energy stored per unit volume
u ½ stress × strain = ½ × stress × stressY
= S22Y.
-Answered by Shruti Srivastva On 21 September 2020:05:33:22 PM
Question 2. Asked on :21 September 2020:05:25:53 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Elastic potential energy stored in the wire,
∪ = ½ Fl = ½ × 200 × 10-3 = 0.1 J.
-Answered by Shruti Srivastva On 21 September 2020:05:28:07 PM
Question 3. Asked on :21 September 2020:05:22:11 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
W = 12 stetching force × increase in length
= 12 Fl.
-Answered by Shruti Srivastva On 21 September 2020:05:23:46 PM
Question 4. Asked on :21 September 2020:05:18:46 PM
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Answer:
-Answered by Shruti Srivastva On 21 September 2020:05:21:03 PM
Question 5. Asked on :21 September 2020:05:14:41 PM
Why are electric poles given hollow structures?
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Answer:
-Answered by Shruti Srivastva On 21 September 2020:05:17:45 PM
Question 6. Asked on :19 September 2020:06:18:55 PM
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Answer:
-Answered by Shruti Srivastva On 21 September 2020:05:16:10 PM
Question 7. Asked on :19 September 2020:06:15:26 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Depression, δ = WL34 bd3
Clearly, the depression of the girder will be small when depth d is large, because δ ∝ d-3.
-Answered by Shruti Srivastva On 19 September 2020:06:16:26 PM
Question 8. Asked on :19 September 2020:06:13:18 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:06:14:27 PM
Question 9. Asked on :19 September 2020:06:10:04 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:06:10:51 PM
Question 10. Asked on :19 September 2020:06:07:21 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:06:08:55 PM
Question 11. Asked on :19 September 2020:06:05:24 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:06:06:18 PM
Question 12. Asked on :19 September 2020:06:04:00 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:06:04:38 PM
Question 13. Asked on :19 September 2020:06:02:16 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
water
-Answered by Shruti Srivastva On 19 September 2020:06:03:19 PM
Question 14. Asked on :19 September 2020:06:00:05 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:06:01:27 PM
Question 15. Asked on :19 September 2020:05:59:03 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:59:55 PM
Question 16. Asked on :19 September 2020:05:57:54 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:58:48 PM
Question 17. Asked on :19 September 2020:05:56:11 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:57:34 PM
Question 18. Asked on :19 September 2020:05:55:02 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:55:51 PM
Question 19. Asked on :19 September 2020:05:53:58 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:54:44 PM
Question 20. Asked on :19 September 2020:05:51:03 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:52:29 PM
Question 21. Asked on :19 September 2020:05:49:33 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:50:48 PM
Question 22. Asked on :19 September 2020:05:48:03 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:49:25 PM
Question 23. Asked on :19 September 2020:05:44:37 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:45:57 PM
Question 24. Asked on :19 September 2020:05:43:33 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
No.
-Answered by Shruti Srivastva On 19 September 2020:05:44:26 PM
Question 25. Asked on :19 September 2020:05:42:06 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:43:16 PM
Question 26. Asked on :19 September 2020:05:39:47 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
(i) Nature of the material.
(ii) Type of stress used in producing the strain.
-Answered by Shruti Srivastva On 19 September 2020:05:40:53 PM
Question 27. Asked on :19 September 2020:05:36:22 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:39:29 PM
Question 28. Asked on :19 September 2020:05:32:59 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:33:43 PM
Question 29. Asked on :19 September 2020:05:31:01 PM
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Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:31:40 PM
Question 30. Asked on :19 September 2020:05:30:02 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:30:49 PM
Question 31. Asked on :19 September 2020:05:27:55 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 19 September 2020:05:28:38 PM
Question 32. Asked on :27 July 2020:12:12:35 PM
A body is just floating in a liquid (of equal density). What happens to the body if it is slightly pressed and released?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The body sinks to the bottom of the liquid.
-Answered by Shruti Srivastva On 27 July 2020:12:14:26 PM
Question 33. Asked on :27 July 2020:12:08:59 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
According to the law of flotation, a body will float in a liquid if weight of the liquid displaced by the body is at-least equal to or greater than the weight of the body.
-Answered by Shruti Srivastva On 27 July 2020:12:10:08 PM
Question 34. Asked on :21 July 2020:05:53:31 PM
What does the gradual fall of barometric height indicate?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The atmospherice pressure falls when the water vapours increase in air. This indicates the possibility of rain.
-Answered by Shruti Srivastva On 21 July 2020:05:54:38 PM
Question 35. Asked on :21 July 2020:05:44:06 PM
Express one atmospheric in terms of Nm-2 and bar.
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
1 atm = 1.013 x 105 Nm -2 = 1.013 x 105 Pa
= 1.013 bar.
-Answered by Shruti Srivastva On 21 July 2020:05:46:01 PM
Question 36. Asked on :20 July 2020:06:00:19 PM
Which of the two forces-deforming of restoring force is responsible for elastic behaviour of substance.
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
-Answered by Shruti Srivastva On 20 July 2020:06:01:40 PM
Question 37. Asked on :20 July 2020:05:59:09 PM
State Hooke's law.
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Refer to point 15 of Glimpses .
-Answered by Shruti Srivastva On 20 July 2020:05:59:53 PM
Question 38. Asked on :20 July 2020:05:57:28 PM
A spiral spring is stretched by a force. What type of strain is produced in it?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Shear strain is produced in it .
-Answered by Shruti Srivastva On 20 July 2020:05:58:30 PM
Question 39. Asked on :20 July 2020:05:54:26 PM
What will happen to the potential energy of the potential energy of the atoms of a solid when it is compressed? What happens when a wire is stretched ?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Potential energy increase in both cases.
-Answered by Shruti Srivastva On 20 July 2020:05:56:48 PM
Question 40. Asked on :20 July 2020:05:50:56 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The wire will break, because the stretching force is increased beyond breaking force.
-Answered by Shruti Srivastva On 20 July 2020:05:53:23 PM
Question 41. Asked on :20 July 2020:05:47:49 PM
If the length of a wire increaces by 1 nm under 1 kg at, what will be the increase under 2 kg wt?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The increase under 2 kg wt is 2mm.
-Answered by Shruti Srivastva On 20 July 2020:05:49:36 PM
Question 42. Asked on :20 July 2020:05:45:04 PM
What is elastic hysteresis?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The fact that the stress-strain curve is not retracted on reversing the strain is called hysteresis.
-Answered by Shruti Srivastva On 20 July 2020:05:46:41 PM
Question 43. Asked on :20 July 2020:05:41:52 PM
What is elastic fatigue?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Elastic fatigue is defined as the lass in the strength of a material caused due to repeated alternating strains to which the material is subjected.
-Answered by Shruti Srivastva On 20 July 2020:05:43:19 PM
Question 44. Asked on :20 July 2020:05:38:51 PM
What is elastic after effect?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The delay on the part of the body in regaining its original configuration on the removal of the deforming force is called the elastic after effect.
-Answered by Shruti Srivastva On 20 July 2020:05:39:52 PM
Question 45. Asked on :20 July 2020:05:37:06 PM
What is breaking stress for a wire of unit cross-section called?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The breaking stress for a wire of unit cross-section called Tensile strength.
-Answered by Shruti Srivastva On 20 July 2020:05:38:11 PM
Question 46. Asked on :20 July 2020:05:35:47 PM
Write the SI unit of modulus of rigidity?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The SI unit of modulus of rigidity is Nm-2.
-Answered by Shruti Srivastva On 20 July 2020:05:36:38 PM
Question 47. Asked on :20 July 2020:05:31:36 PM
Define modulus of rigidity.
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
Modulus of rigidity is the ratio of tangenital stress of the shearing strain within the elastic limit.
-Answered by Shruti Srivastva On 20 July 2020:05:32:38 PM
Question 48. Asked on :20 July 2020:05:28:25 PM
Young's modulus of the material of a wire is Y. On pulling the wire by a force , the increase in its length is x. What will be the potential energy of the stretched wire?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
P.E. of stretched wire = 12 Fx .
-Answered by Shruti Srivastva On 20 July 2020:05:30:37 PM
Question 49. Asked on :20 July 2020:05:25:23 PM
What is poisson's ration ?
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The ratio of the lateral strain to the tangenital stress to the shearing strain is called poisson's ratio.
-Answered by Shruti Srivastva On 20 July 2020:05:26:11 PM
Question 50. Asked on :20 July 2020:05:23:16 PM
-Added by Shruti Srivastva Physics » Mechanical Properties Of Solids
Answer:
The value of modulus of rigidity of an incompressible liquid is zero.
-Answered by Shruti Srivastva On 20 July 2020:05:24:47 PM
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