JEE Main 20208 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2020
- Date
- 8 January
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Center of Mass, Momentum and Collision
JEE Main 2020 · 8 January · Morning Shift · Physics · Center of Mass, Momentum and Collision
The coordinates of the centre of mass of a uniform flag-shaped...
The coordinates of the centre of mass of a uniform flag-shaped lamina (thin flat plate) of mass . (The coordinates of the same are shown in the figure) are:
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
\overset{\to}{r}cm = \dfrac{2 \times \left(\overset{^}{i}2 + \overset{^}{j}\right) + 2 \times \left(\overset{^}{i} + \dfrac{5\overset{^}{j}}{2}\right)}{4}
{\overset{\to}{r}}_{cm} = \dfrac{3}{4}\overset{^}{i} + \dfrac{7}{4}\overset{^}{j}