Exams › NEET › Physics

The coefficient of restitution $e$ for a perfectly elastic collision is:

1. 1
2. 0
3. ∞
4. −1

Correct answer: 1

Solution

The coefficient of restitution is defined as the ratio of relative speed after collision to relative speed before collision. For a perfectly elastic collision, this ratio is 1. Hence, $e=1$.

Related NEET Physics questions

• For an inelastic collision between two spherical rigid bodies:
• Statement 1: In an elastic collision between two bodies, the relative speed of the bodies after collision is equal to the relative speed before the collision. Because Statement 2: In an elastic collision, the linear momentum of the system is conserved.
• If the force on a rocket ejecting gases with a relative velocity of $300\,\text{m/s}$ is $210\,\text{N}$, then the rate of combustion of the fuel is:
• The initial thrust of the blast is:
• Two particles initially at rest move towards each other under the action of their internal attraction. If their speeds are $v$ and $2v$ at any instant, then the speed of the centre of mass of the system is:
• A mass $m$ moving horizontally along the $x$-axis with velocity $v$ collides and sticks to a mass $3m$ moving vertically upward along the $y$-axis with velocity $2v$. The final velocity of the combination is:

⚔️ Practice NEET Physics free + battle 1v1 →