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2. Bianca stands on top of a tall building. She drops a 3 kg rock from rest. Ignoring air resistance, what will be the
velocity of the rock after 3 s?
A. -10 m/s
B. -30 m/s
-0.33 m/s
+10m/s

2 Bianca stands on top of a tall building She drops a 3 kg rock from rest Ignoring air resistance what will be the velocity of the rock after 3 s A 10 ms B 30 m class=

Respuesta :

Answer:

v=-30 m/s

Explanation:

Using the equation:

v=u+at

v=?

u means initial velocity=0

a=-10 since it is going down we make the acceleration due to gravity negative

t=3

v=0+(-10)(3)

v=-30 m/s

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