Question

Sunita uses a lever of length 5m to lift a piece of stone weighing 1000N.

If the distance of the load from the fulcrum is Im, how much effort does she
apply to lift the piece of stone
​

Answer 1

F = 250 [N] (Force exerted by Sunita)

Step-by-step explanation:

First we must understand the use of the lever, in the attached picture we see that it is fulcrum and other features.

The moment that the load exerts with respect to the fulcrum should be calculated, as the distance is 1 [m].

`M=F*d\\M=1000*1\\M=1000[N*m]`

Now Sunita must exert the same moment using the remaining distance (4 [m]).

`1000=F_(sunita)*4\\F_(sunita)=1000/4\\F_(sunita)=250 [N]`