Statements on Collisions – Rankers Physics
Topic: Center of Mass , Momentum and Collision
Subtopic: Collision

Statements on Collisions

Consider the given statements and choose the correct option that follows:
Statement 1: During a collision the total linear momentum of system is conserved at each instant of collision.
Statement 2: During a collision the kinetic energy conservation holds always.
Based on above information, pick the correct option.
 
Both statements (1) and (2) are true
Both statements (1) and (2) are false
Statement (1) is true but (2) is false
Statement (1) is false but (2) is true

Solution:

Total linear momentum is conserved at each instant of collision because no external forces act. Kinetic energy, however, is not conserved during the period of deformation, and is conserved after only in perfectly elastic collisions. Thus, Statement 1 is true and Statement 2 is false.

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