Laws of Motion · NEET Preparation Physics
Two blocks of masses 2 kg and 3 kg are in contact on a smooth horizontal surface. A horizontal force of 10 N is applied to the 3 kg block. What is th…
Practice question from Laws of Motion (NEET Preparation Physics), with the correct answer and a step-by-step solution.
medium · MCQ · Q-BCD227
Two blocks of masses 2 kg and 3 kg are in contact on a smooth horizontal surface. A horizontal force of 10 N is applied to the 3 kg block. What is the contact force exerted by the 3 kg block on the 2 kg block?
- A.2 N
- B.4 NCorrect answer
- C.6 N
- D.10 N
Solution
The common acceleration is a = 10/(2 + 3) = 2 m/s². The force needed to accelerate the 2 kg block is F = 2 × 2 = 4 N, which is the contact force exerted on it by the 3 kg block.
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