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Vsevolod [243]
2 years ago
15

A rock is dropped from a helght of 2.5 meters. What is its velocity when it reaches the ground?

Physics
1 answer:
Nataly_w [17]2 years ago
7 0

u=0 m/s

h=2.5m

Using kinematic eq:

{v}^{2}  -  {u}^{2}  = 2gh \\  {v}^{2}  -  {0}^{2}  = 2gh \\ v =  \sqrt{2gh}  \\ v =  \sqrt{2 \times 10 \times 2.5}  \\ v =  \sqrt{50}  \\ v = 7.07m/s

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