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Standard XII

Physics

Throwing and Catching at Same Height

The observati...

Question

The observation deck of tall skyscraper $370 m$ above the street. Determine the time required for a penny to free fall from the deck to the street below.

8.69 s

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7.69 s

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5.69 s

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8.6 s

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Solution

The correct option is A $8.69 s$
Height above the street $h = 370 m$
Time of flight $T = \sqrt{\frac{2 h}{g}}$
$⟹ T = \sqrt{\frac{2 \times 370}{9.8}} = 8.69 s$

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The observation deck of tall skyscraper 370m above the street. Determine the time required for a penny to free fall from the deck to the street below.

The correct option is A 8.69sHeight above the street h=370 mTime of flight T=√2hg⟹ T=√2×3709.8=8.69 s

The observation deck of tall skyscraper $370 m$ above the street. Determine the time required for a penny to free fall from the deck to the street below.

The correct option is A $8.69 s$
Height above the street $h = 370 m$
Time of flight $T = \sqrt{\frac{2 h}{g}}$
$⟹ T = \sqrt{\frac{2 \times 370}{9.8}} = 8.69 s$