An object weights 10 N in air, 8 N in water. The buoyant force is
A. 18 N
B. 10 N
C. 8 N
D. 2 N
Answer: Option D
Solution (By JKSSB Mock Tests)
Loss in weight = buoyant force = 10 - 8 = 2 N. Weight of displaced water = 2 N. Volume of object = mass of displaced water / density. Archimedes principle.
Explanation:
Centripetal force acts towards centre, necessary for circular motion. Centrifugal is pseudo-force in rotating frame. In uniform circular motion, centripetal force = mv²/r.
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