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Practice question

MCQ

Question

A 6kg block on a 30∘ incline (μk\=0.25) is connected to a 3kg mass over a pulley. What is the acceleration of the system? (Take g\=10m/s2, sin⁡30∘\=0.5, cos⁡30∘\=0.866)

Options

Choose one · Correct answer highlighted

Explanation

Assume 6kg moves down the incline, pulling 3kg up. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 2.83 m/s2 as the result, so option B is correct.

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