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3 years ago

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]3 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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