NEET Physics Work-Energy Theorem MCQ Question
A block of mass 1 kg is moving on a horizontal surface with an initial speed of 2 m/s. It encounters a rough patch where the retarding force is given by F(x) = -0.5/x for 0.1 < x < 2.01 m. What is the final speed of the block as it exits the rough patch?
5 m/s
0 m/s
0.5 m/s
0.0 m/s
Correct Answer
Detailed Explanation
The work-energy theorem relates the work done by the force to the change in kinetic energy. The work done by the force is calculated by integrating F(x) over the given range, resulting in a change in the block's kinetic energy, allowing us to solve for the final speed.
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