Question bank/JEE Main/Physics
JEE MainPhysicsTough
Find the acceleration of each block.
Show answer and solution
Tendency of 2 kg block is of coming down and of 1 kg is of going
up.
[IMAGE] Where F1 is friction between 1 kg and 2 kg block and F2 is friction
between 2 kg and inclined surface.
For 2 kg block 2 × 10 ×[IMAGE] - T - F1 - F2 = 2a
For 1 kg block T - 1 × 10 ×[IMAGE] × F1 = a
⇒ Add both 10 - 5 - 2F1 - F2 = 3a
5 - 2F1 - F2 = 3a
The max. value F1 = 0.1 × 1 × 10[IMAGE] F2max = 3 × 10 × 0.2 ×[IMAGE] Max (2F1 + F2) =[IMAGE] ⇒ Static friction will act. ⇒ a = 0
TOPIC: NLM
SUB TOPIC: FRICTION
up.
[IMAGE] Where F1 is friction between 1 kg and 2 kg block and F2 is friction
between 2 kg and inclined surface.
For 2 kg block 2 × 10 ×[IMAGE] - T - F1 - F2 = 2a
For 1 kg block T - 1 × 10 ×[IMAGE] × F1 = a
⇒ Add both 10 - 5 - 2F1 - F2 = 3a
5 - 2F1 - F2 = 3a
The max. value F1 = 0.1 × 1 × 10[IMAGE] F2max = 3 × 10 × 0.2 ×[IMAGE] Max (2F1 + F2) =[IMAGE] ⇒ Static friction will act. ⇒ a = 0
TOPIC: NLM
SUB TOPIC: FRICTION
Source: Grass-G / P-03 Paper 1 (Physics) Eng. + Hindi 24-8-2020.docx
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