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28-01-2020
Physics

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A ball thrown vertically upward reaches a maximum height of 30. meters above the surface of Earth. At its maximum height, the speed of the ball is _________.
a. 0.0 m/s
b. 3.1 m/s
c. 9.8 m/s
d. 24 m/s

Respuesta :

alankabisov0225 alankabisov0225

28-01-2020

Answer:

a. 0.0 m/s

Explanation:

According to the law of conservation of energy, the maximum potential energy of the body is equal to the minimum kinetic energy:

P+K=const; Pmax=mgH Kmin=mv^2/2=0 (because v=0)

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