Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-conceptual-Hard-Class 11
Which of the following combinations of statements regarding the work-energy principle and conservative forces is correct?
A
- The work done by gravitational force is path-dependent. 2. The potential energy associated with height is converted into kinetic energy when falling.
B
- The work done by a conservative force is independent of the path taken. 2. An object's kinetic energy at the bottom of an incline equals its potential energy at the top.
C
- The gravitational force does positive work when lifting an object. 2. Potential energy depends on the final velocity of the object.
D
- The work done by non-conservative forces is always zero. 2. The speed of an object at the bottom of an incline depends on the angle of inclination.
Correct Answer
Option B
Detailed Explanation
The work done by conservative forces, such as gravity, is independent of the path taken, and the potential energy at the top of an incline is converted entirely into kinetic energy at the bottom, as indicated in the provided context.
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