Pulley Systems
Mediumphysics
Two blocks of masses 3 kg and 2 kg are connected by a string passing over a frictionless pulley. What is the acceleration of the system? (g = 10 m/s²)
Select the correct option:
Solution
Incorrect! Answer:
2 m/s²
- System Analysis: In an Atwood machine, the heavier mass pulls the system.
- Net Force: Tension T is internal. The net external force is the difference in weights.
- Fnet=(m1−m2)g=(3−2)×10=10 N.
- Total Mass: M=m1+m2=3+2=5 kg.
- Acceleration:
- a=Fnet/M=10/5=2 m/s2.
- General Formula: a=m1+m2m1−m2g.
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About This Question
- Subject
- physics
- Chapter
- laws of motion
- Topic
- pulley systems
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
2 m/s²
- System Analysis: In an Atwood machine, the heavier mass pulls the system.
- Net Force: Tension T is internal. The net external force is the difference in weights.
- Fnet=(m1−m2)g=(3−2)×10=10 N.
- Total Mass: M=m1+m2=3+2=5 kg.
- Acceleration:
- a=Fnet/M=10/5=2 m/s2.
- General Formula: a=m1+m2m1−m2g.
This medium difficulty physics question is from the chapter laws of motion, covering the topic of pulley systems. It appeared in the 2025 exam.
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