Question #174611

A STONE IS THROWN STRAIGHT UP INTO THE AIR AND HAS A HANG TIME OF 5 SECONDS FIND THE HEIGHT TO WHICH THE BALL REACHES ITS PEAK


1
Expert's answer
2021-03-24T19:41:28-0400

Answer

Using newton second equation of motion

v=u+atv=u+at

0=ugt0=u-gt

u=gt

So maximum height

H=u22g=g2t22g=gt22=10×5×52=125mH=\frac{u^2}{2g}\\=\frac{g^2t^2}{2g}\\=\frac{gt^2}{2}\\=\frac{10\times5\times5}{2}\\=125m





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