While the ball is held 20 meters above the floor,
Potential energy = (mass) (gravity) x (height) =
(0.5 kg) x (9.8 m/s²) x (20 m) = 98 joules.
When it's dropped and reaches 1/2 of its initial height, it has half as much
potential energy. The rest has turned into kinetic energy = <em>49 joules.
</em>============================================================<em>
</em>
Want to know what else you can figure out ? Watch this . . .
<u> Kinetic energy = (1/2) x (mass) x (speed)²</u>
49 joules = (1/2) x (0.5 kg) x (speed)²
Divide each side by (0.25 kg): 49 joules / 0.25 kg = speed²
Take the square root of each side: 7/0.5 = speed = <em><u>14 meters per second</u></em>
That's the speed of the ball after falling 10 meters !
How cool is that !
<span>The heaviest precipitation falls on the western slopes of the cascades.
Explanation: the wind blowing from Pacific ocean contains a lot of moisture. While it raises it cools down and condenses forming rain. This happens on the side of cascades at which air rises. In this case it is western slope of the cascade which is closer to Pacific ocean.</span>
For the answer to the question above, <span>When a weather map shows a wind symbol at 270 it indicates that the wind is coming from the WEST.
I hope my answer helped you. Feel free to ask more questions. Have a nice day!</span>
