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QJEEM20Phb06b: JEE Main 2020 Physics - Class 11 JEEM20Phb06b Solution: The coordinates of centre of mass of a uniform flag shaped…

The coordinates of centre of mass of a uniform flag shaped lamina (thin flat plate) of mass 4kg. (The coordinates of the same are shown in figure) are : JEE Main 2020 (Online) 8th January Morning Slot Physics - Center of Mass and Collision Question 80 English

Multiple Choice Options

  • A (0.75m, 1.75m)
  • B (1m, 1.75m)
  • C (0.75m, 0.75m)
  • D (1.25m, 1.50m)

Step-by-Step Verified Solution

JEE Main 2020 (Online) 8th January Morning Slot Physics - Center of Mass and Collision Question 80 English Explanation

m1 = σA1 = σ×(1×2) = 2σ

m2 = σA2 = σ×(2×1) = 2σ

∴ xcm = m1x1+m2x2m1+m2

= 2σ×0.5+2σ×12σ+2σ = 0.75

and ycm = m1y1+m2y2m1+m2

= 2σ×1+2σ×2.52σ+2σ = 1.75

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