Which of the following graphs represents a body at rest?
A. Displacement-time graph with constant positive slope
B. Displacement-time graph parallel to time axis
C. Velocity-time graph with zero slope
D. Velocity-time graph with positive slope
Answer: Option B
Solution (By JKExamLibrary)
For a body at rest, displacement remains constant over time. The displacement-time graph is a horizontal line, parallel to time axis, indicating zero slope (velocity = 0). Option A indicates constant velocity. Option B (velocity-time zero slope) means constant velocity, not necessarily rest (could be constant non-zero velocity). Option D indicates acceleration. So C is correct.
Explanation:
In third class lever, effort between fulcrum and load. Fishing rod, tweezers, forearm. Scissors first class, crowbar first/second, seesaw first. Mechanical advantage
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