NEET Physics (general) MCQ Question
Which of the following statements about elastic collisions and the motion of particles is correct?
In an elastic collision between two equal masses, they will move at right angles after the collision.
Elastic collisions can only occur when the masses are of different sizes.
The total mechanical energy is always conserved in elastic collisions, regardless of the masses involved.
Collisions between spherical masses with rough surfaces are treated the same as those with smooth surfaces.
Correct Answer
Detailed Explanation
Statement A is correct as it reflects the result derived from elastic collisions between equal masses, where they move at right angles post-collision. Statement B is incorrect because equal masses can also collide elastically. Statement C is misleading since the conservation of energy applies to elastic collisions, but mass equality is not a prerequisite. Statement D is incorrect as the properties of surfaces affect the type of collision.
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