Three blocks are connected on a frictionless surface. Force . Find tension .
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Official Solution
Correct Option: (3)
Step 1: Total mass
Step 2: Find
Tension between and pulls last block:
But required tension between first two blocks:
Conclusion:
02
PYQ 2014
medium
physicsID: met-2014
The acceleration of block in the given pulley system is
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Official Solution
Correct Option: (1)
Concept:
Pulley constraint displacement/acceleration relation. Step 1: Constraint
If block moves down by , block moves horizontally by . Step 2: Apply Newton’s law For :
For :
Step 3: Substitute Conclusion:
03
PYQ 2014
medium
physicsID: met-2014
Two blocks and are connected and suspended by a spring. Find accelerations just after cutting the string.
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Official Solution
Correct Option: (2)
Concept:
Initially system in equilibrium spring force balances total weight. Step 1: Initial tension in spring
Step 2: Just after cutting string
Spring force unchanged instantly. For block :
For block :
Only gravity acts:
Conclusion:
