Practice question

MCQ

Question

A 8kg block is pushed with 40N over 6m on a frictionless surface, starting from 2m/s. What is its final speed?

Options

Choose one · Correct answer highlighted

7 m/s 8 m/s Correct 9 m/s 10 m/s

Explanation

Initial Ki=12×8×22=16J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 8 m/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.

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