Two small blocks slide without losing contact with the surface al… - Vidyadip

MCQ

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
✓
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

✓

Answer

Correct option: B.

Block on track $2$ reaches the finish line first

b
(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.

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