damariwave damariwave

28-05-2021
Physics

contestada

What is the magnitude of kinetic energy of a 20kg box moving at a velocity of 8m/s

A. 160 J

B. 80 J

C. 640 J

D. 1280 J

Respuesta :

Luv2Teach Luv2Teach

06-06-2021

Answer:

Explanation:

[tex]KE=\frac{1}{2}mv^2[/tex] and we are solving for KE:

[tex]KE=\frac{1}{2}(20)(8)^2[/tex] which gives us that

KE = 640 J, choice C.

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