Question

How much work does it take to raise a `2 kg` weight `1 m`?

Answer 1

`W=19.62J`

Explanation:

The equation of work, a type of energy transfer is given by `W=Fs` in which;

`W`=Work done, in Joule `(J)`
`F` = Force exerted or applied, in Newton `(N)` or `kg m s^(-2)`
`s` = Displacement/Distance, in metre or `m`

But then we only have information of mass, `m=2kg` and distance, `s=1m`. To find force, `F`, we use the equation of `F=ma` which is also equal to `F=mg` in which;

`m` = Mass of object, in kilogram or `kg`
`g` = Gravitational acceleration, in `m s^(-2)`

Thus;

`W=Fs`
`W=(mg)s`
`W=(2kg xx 9.81m s^(-2)) xx 1m`
`W=19.62kg m^2 s^(-2)` or `19.62N m` or `19.62J`