Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 2 (Q.No. 31)
31.
Which of the following statement is correct?
Discussion:
13 comments Page 1 of 2.
JOHN said:
1 decade ago
My knowledge is that every object at rest posses a potential energy. In addition to this, I just wonder how possible it may be for a body that a body that just had a collision posses lesser energy when at its initial kinetic energy before collision.
Montu said:
8 years ago
I think after impact the stress induced in the body was more so it will directly affect the energy consumption rate and also change in moment of area.
Scientist sakthivel said:
8 years ago
For perfect elastic body, loss of K.E iske1=ke2
And perfectly plastic impact K.E=(ke1-ke2)
Energy can't be negative.
So K.E1 is greater than KE2.
And perfectly plastic impact K.E=(ke1-ke2)
Energy can't be negative.
So K.E1 is greater than KE2.
(1)
Paresh said:
1 decade ago
If losses are considered then D is the answer,
But if the collision is perfectly elastic then B is correct as per conservation of energy.
But if the collision is perfectly elastic then B is correct as per conservation of energy.
Raushan kumar said:
8 years ago
It is not cleared that what types of collision occur. Hence answer should be a, b & d depending on types of collision.
Chetan patel said:
1 decade ago
Loss of KE. Takes place during impact so KE. Before impact is more than KE after impact.
Vasantharaj M J said:
6 years ago
Is it for elastic, inelastic, plastic or real case? Please tell me.
Ramji verma said:
6 years ago
When condition is not given then we assume that condition is ideal.
Vaishali said:
8 years ago
Here, it is not said the body is elastic hence answer is d.
Balu said:
8 years ago
Given answer is correct if the collision is inelastic.
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