selfobsession selfobsession

19-10-2017
Physics

contestada

An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?
Please explain.
_____ ft/s

6400
2000
80.
44

Respuesta :

Vespertilio Vespertilio

30-06-2019

Answer:

80 ft/s

Explanation:

Use III equation of motion

V^2 = U^2 + 2g h

Here, U = 0, g = 32 ft/s^2, h = 100 ft

V^2 = 0 + 2 × 32 ×100

V^2 = 6400

V = 80 ft/s

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