TS EAMCET · Physics · Rotational Motion
For a system to follow the law of conservation of linear momentum during a collision, the condition is : (1) total external force acting on the system is zero. (2) total external force acting on the system is finite and time of collision is negligible. (3) total internal force acting on the system is zero.
- A (1) only
- B (2) only
- C (3) only
- D (1) or (2)
Answer & Solution
Correct Answer
(A) (1) only
Step-by-step Solution
Detailed explanation
From Newton's second law, \(F=\frac{d p}{d t}\) If \(F=0\), then \(\frac{d p}{d t}=0\) \(\Rightarrow \quad p=\) constant Thus, if total external force acting on the system is zero, then linear momentum of the system remains conserved.
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