A pendulum bob of mass m connected to the end of an ideal string of length l is released…
Physics · JEE Advanced · NTA Exams — Laws of Motion
A pendulum bob of mass m connected to the end of an ideal string of length l is released from rest from horizontal position as shown. At the lowest point, the bob makes an elastic collision with a stationary block of mass 5m, which is kept on a frictionless surface. Mark out the correct statement(s) for the instant just after the impact.
- Tension in the string is 17 mg/9
- Tension in the string is 3 mg
- The velocity of the block is \(\frac{\sqrt{2 \mathrm{~g} \ell}}{3}\)
- The maximum height attained by the pendulum bob after impact is (measured from the lowest position)\(\frac{4 \ell}{9}\)
Answer
(A) Tension in the string is 17 mg/9, (C) The velocity of the block is 2 ~g 3, (D) The maximum height attained by the pendulum bob after impact is (measured from the lowest position) 4 9
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