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A rock is dropped from a height of 2.5 meters. What is its velocity when it reaches the ground? a.3.5 meters/second b.7.0 meters/second c.12 meters/second d.14 meters/second e.49 meters/second

Alexa Spicer

in Physics

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Carlton Burgess on August 8, 2018

We know, v2 - u2 = 2asHere, u = 0 [ Free fall ]a = 9.8 m/s2 [ the value of the Constant for the System of the Earth ]s = 2.5 mSubstitute their values, v2 - 0 = 2 * 9.8 * 2.5v2 = 49v = √49v = 7 m/sin short, His Answer would be the Option Hope this helps!


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