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In: Physics

A rock is tossed with an initial speed of 20 m/s, 60° above the horizontal. Ignoring...

A rock is tossed with an initial speed of 20 m/s, 60° above the horizontal.

Ignoring air resistance, what is its speed 3s after it was thrown?

                                               

A.

18.9m/s

B.

14.6m/s

C.

15.7m/s

D.

11.2m/s

E.

4.3m/s

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