COMEDK · Physics · 6. Work Power Energy
One end of the string of length \(l\) is connected to a particle of mass \(m\) and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed \(v\), the net force on the particle (directed towards centre) will be ( \(T\) represents the tension in the string)
- A \(T+\dfrac{m v^2}{l}\)
- B \(T-\dfrac{m v^2}{l}\)
- C zero
- D \(T\)
Answer & Solution
Correct Answer
(D) \(T\)
Step-by-step Solution
Detailed explanation
The particle moves in a circle on a smooth horizontal table. Vertical forces (gravity and normal reaction) balance each other. In the horizontal plane, the only force acting towards the centre is the tension \(T\) in the string. This tension provides the centripetal force:…
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