Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 1 (Q.No. 45)
45.
During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.
Discussion:
12 comments Page 1 of 2.
Harshil said:
8 years ago
Actually, all are right that for the elastic body it will be less than. But one of the answers mentioned that opposite direction. And actually, it matters more. So we assume that the body is perfectly elastic.
Shivaprasad Karnati said:
9 years ago
C is the correct answer because it is given that collision is elastic but not perfectly elastic.
So e<1 therefore relative velocity of bodies after impact is less than before.
So e<1 therefore relative velocity of bodies after impact is less than before.
Vishnu Agrawal said:
6 years ago
Option C is correct as for an elastic body e<1. Hence Velocity of separation will be less than the Velocity of Approach hence option B is incorrect. So, the option is C.
Basawaraj said:
8 years ago
For the elastic bodies, it is" less than and opposite" but there is no option suiting this.
So it is assumed that the bodies are perfectly elastic.
So it is assumed that the bodies are perfectly elastic.
Ajay sen said:
9 years ago
For perfectly elastic bodies the answer will be equal and opposite. But for elastic bodies answer it will be less than or equal.
Bipin Kumar said:
7 years ago
B is the right answer. Because it say about direction i.e. opposite direction and assumed it as a perfectly elastic.
Aman said:
9 years ago
I think correct answer will be option C.
As coefficient of restitution is less than 1 for elastic collision.
As coefficient of restitution is less than 1 for elastic collision.
Gaurav said:
1 decade ago
Answer should be C. As its not perfectly elastic.
Rishu said:
7 years ago
I think the correct option is C.
Sanjay patel said:
9 years ago
The answer should be option C.
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