The defect of vision in which a person cannot see nearby objects clearly is
A. Astigmatism
B. Hypermetropia
C. Myopia
D. Presbyopia
Answer: Option B
Solution (By JKSSB Mock Tests)
Hypermetropia (farsightedness): near point farther away, difficulty seeing close objects. Corrected with convex lens. Myopia: distant objects blurry. Presbyopia due to aging. Astigmatism due to irregular cornea.
Explanation:
In free fall under gravity alone, mechanical energy (kinetic + potential) is conserved, assuming no air resistance. Potential energy decreases while kinetic energy increases, sum constant. Law of conservation of mechanical energy. Non-conservative forces absent.
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