In the coefficient of restitution e for direct central impact of two particles, e is defined as:

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Mechanical Engineering QUESTION #2519

Question 1

In the coefficient of restitution \(e\) for direct central impact of two particles, \(e\) is defined as:

The ratio of relative velocity of approach to relative velocity of separation
\(e = \frac{v_{B2}-v_{A2}}{v_{A1}-v_{B1}}\) — ratio of relative velocity of separation to approach✔️
\(e = \frac{m_A v_{A1}+m_B v_{B1}}{m_A+m_B}\)
The ratio of kinetic energies before and after impact

Correct Answer Explanation

The coefficient of restitution: \(e=\frac{v_{B2}-v_{A2}}{v_{A1}-v_{B1}}\). For perfectly elastic impact \(e=1\); for perfectly plastic \(e=0\).