NEET 2019 · PhysicsPrevious Year Question
When an object is shot up a long smooth inclined plane kept at 60^° with the horizontal, it travels a distance x₁ along the plane. When the inclination is decreased to 30^° and the same object is shot with the same velocity, it travels a distance x₂. Then x₁:x₂ will be
Answer: (C) 1 : √(3). Correct Answer (C): 1 : √(3) Solution: Smooth incline: ½ mv²=mg xsinθ⇒ x=v²/2gsinθ∝1/sinθ.
- A.1 : √(2)
- B.√(2) : 1
- C.1 : √(3)✓
- D.1 : 2√(3)
Correct Answer
(C) 1 : √(3)
Solution & Explanation
Correct Answer (C): 1 : √(3) Solution: Smooth incline: ½ mv²=mg xsinθ⇒ x=v²/2gsinθ∝1/sinθ. x₁/x₂=(sin30^°)/(sin60^°)=(1/2)/(√3/2)=1/(√3).
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