Question

A cinder block is sitting on a platform 20 m high it weigh 79 .N how much energy does it have?

Answer 1

`"1580 Joule"`

Explanation:

Potential energy (`"U"`) at a height `"h"` is given as

`"U = mgh"`

`"U" = "mg" × "h" = "79 N" × "20 m" = "1580 Joule"`

As, the block is sitting ideal `("K.E" = 0)` it is its total energy.