Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-conceptual-Easy-Class 11
Which of the following statements about work and energy is correct?
A
The work done by a gravitational force is always positive when moving an object upwards.
B
The gravitational force does no work on the moon as it moves in a circular orbit around the Earth.
C
Work and energy have different dimensions, with energy being measured in joules.
D
Negative work indicates that the force and displacement are in the same direction.
Correct Answer
Option B
Detailed Explanation
The gravitational force does no work on the moon because its force is radially inwards while the moon's displacement is tangential, resulting in a 90-degree angle (cos q = 0). This is discussed in the context of gravitational forces and work in the NCERT content.
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