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Rom4ik [11]
3 years ago
6

An object is dropped from a platform 100 feet high. Ignoring wind resistance, how long will it take to reach the ground? _____ s

Physics
2 answers:
gizmo_the_mogwai [7]3 years ago
6 0

Height of the platform = 100 feet

1 feet = 0.3048 m

100 feet = 30.48 m

Acceleration due to gravity (g) = 9.8 m/s^2

Let the time taken be t

Initial velocity of the object (u) = 0 m/s

Using the seconds equation of motion:

s = ut + \frac{1}{2}at^2

30.48 = 0 + \frac{1}{2}\times 9.8 \times t^2

t = \sqrt{\frac{30.48}{4.9} }

t = 2.5 seconds

Hence, the option (b) is correct.

Natasha2012 [34]3 years ago
3 0

Answer:

Answer B is correct.

Explanation:

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