A crowbar is of length 3 m. Where should the fulcrum be placed along the length of the crowbar so that a boulder of 9 `kg_(wt)` be lifted with it by applying an effort of 10 N? `(g = 10 m s^(-2))`

Explanation

Find the length of the crowbar.
Find the value of the effort from given data
Find the value of the load from the given data.
(Convert it into S.I. units).
Now, load `xx` load arm = effort X effort arm (1)
Substitute the values of load and effort.
Find the ratio of the load arm to effort arm from equation (1)
Here, load arm + effort arm = 3 m.
Now, find the position of the fulcrum from the load arm.
Is load arm = `(1)/(10)` th part of 3 m?