MCQ
Two equal rods joined at one end are kept on a smooth surface as shown and released. Trajectory of centre of mass of both rods is


- Aparabola
- ✓straight vertical line
- Cstraight inclined line
- Dstraight horizontal line

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$Assertion$ $(A)$ : In Vernier calliper if positive zero error exists, then while taking measurements, the reading taken will be more than the actual reading.
$Reason$ $(R)$ : The zero error in Vernier Calliper might have happened due to manufacturing defect or due to rough handling.
In the light of the above statements, choose the correct answer from the options given below :
