Two small blocks slide without losing contact with surface along two frictionless tracks 1 and 2 , s

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2.Motion in Straight Line

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Two small blocks slide without losing contact with the surface along two frictionless tracks $1$ and $2$ , starting at the same time with same initial speed $v$. Track $1$ is perfectly horizontal, while track $2$ has a dip in the middle, as shown in the figure.Which block reaches the finish line first?[Hint: Use velocity-time graph to solve]

A

Block on track $1$ reaches the finish line first

B

Block on track $2$ reaches the finish line first

C

Both blocks reach the finish line at the same time

D

It depends on the length of the dip in the second track. relative to the total length of the tracks

(KVPY-2009)

Solution

(b)

Block $2$ moves for a certain period of time with higher velocity (compared to that of block $1$).

So, block $2$ finishes the race earlier.

Standard 11

Physics

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