Collision fundamentals: Value of the coefficient of restitution for perfectly elastic bodies. Interpret the statement: “The coefficient of restitution for elastic bodies is one.” Choose the correct truth value.
Mechanical Engineering
Engineering Mechanics
Difficulty: Easy
Choose an option
-
ATrue
-
BFalse
-
CTrue only for oblique impacts
-
DTrue only if masses are equal
Answer
Correct Answer: True
Explanation
Concept/Approach
- Coefficient of restitution e is defined as the ratio of the relative speed of separation to the relative speed of approach along the line of impact.
- For a perfectly elastic impact, kinetic energy is conserved and e = 1.
Common pitfall Assuming e depends on masses; it is a property of the collision pair and impact conditions.
Final Answer True