1.

An owl has a mass of 3 kg. It dives to catch a mouse on the ground losing 900 J of potential energy. How high was the bird to begin with?

Answer»

SOLUTION :m=3 KG , PE=900 J , `g=10 m//s^2`
PE=mgh
So H =PE/mg
`=900/3xx10=900/30=90/3`m = 3 m


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