A body of mass 20kg hangs 4m and swings through a vertical height of 0.9m. Determine a)the potential energy as its position b)the speed of the body...

A body of mass 20kg hangs 4m and swings through a vertical height of 0.9m. Determine
a)the potential energy as its position
b)the speed of the body when passing through the lowest point

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a)P.E=mass x gravity x height
=20x4x9.8
784kgm*2/s*2.



b)kinetic energy gained =Potential energy lost
1/2x20xv*2 =784kgm*2/s*2
20v*2=784.
v*2=78.4
v=8.85m/s

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king1992 answered the question on June 29, 2018 at 07:18

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