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Matter Waves

The displacem...

Question

The displacement of ball w.r.t. ground during its flight is

A

32.64 m

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B

2 m

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C

52 m

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D

30.64 m

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Solution

The correct option is B $30.64 m$
Displacement of floor of elevator in $2.13 s$ is
$s_{1} = 10 t + \frac{1}{2} \times 5 \times t^{2} = 32.64 m$
So displacement of ball w.r.t. ground
$_{B G} =_{B E} +_{E G} = - 2 + 32.64 = 30.64 m$

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