The area under a velocity-time graph represents which of the following physical quantities?
A. Force
B. Acceleration
C. Displacement
D. Momentum
Answer: Option C
Solution (By JKSSB Mock Tests)
The area under the curve of a velocity-time graph represents the total displacement covered by an object in a given time interval. Since velocity = displacement/time, the product of velocity and time (the area) yields displacement. The slope of a velocity-time graph, conversely, represents acceleration.
Explanation:
Gamma rays (photons) have highest penetration, stopped by thick lead/concrete. Alpha least (paper/skin). Beta intermediate (aluminium). Neutrons also penetrating but not listed. Gamma has no charge.
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