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Find the total energy of a body of 5 kg ...

Find the total energy of a body of 5 kg mass , which is at a height of 10 m from the earth and falling downwards straightly with a velocity of 20 m/s (Take the acceleration due to gravity as `10m//s^(2)` )

Text Solution

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Mass m = 5 kg , Height h = 10 m , g = 10 `m//s^(2)`
Velocity `v=20m//s` .
Total energy = PE +KE = mgh + `(1)/(2)mv^(2)`
`=(5xx10xx10)+(1)/(cancel(2))xx5xxcancel20^(10)xx20`
`=500+1000=1500J`
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