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Motion in Two Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in Two Dimension1 Mark
MCQ
A particle moves in a circular path with decreasing speed. Choose the correct statement.
  • ✓
    ngulr momentum remins constnt
  • B
    Acceleration $(\vec{a})$ is towards the center
  • C
    Particle moves in a spiral path with decreasing radius
  • D
    The direction of angular momentum remains constant
✓

Answer

Correct option: A.
ngulr momentum remins constnt
(a) Difference in kinetic energy = $2 mg r=2 \times 1 \times 10 \times 1=20 J$

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