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April 20, 2014

April 20, 2014

Posted by **Isis** on Friday, June 14, 2013 at 9:14am.

_____ ft/s

Please help me!!!

- Physics -
**Chan**, Friday, June 14, 2013 at 9:36amsolution

height(h)= 100ft

since the object starts at rest,

initial speed(U)=0

Final speed (v)= ?

since the object is falling under the influence of gravity and downwards

a=g= 32.17 ft/s^2

so

we have

v2=u2+2gh

v2= 0+ 2*32.17*100

v2= 6434

v=80.21f/s

the final speed was 80.21 f/s

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