A ladder of length rests against a smooth wall, making an angle of 50° to the horizontal. The forces on the ladder are shown below. If the frictional force exerted on the ladder by the ground is 65 N, what is the mass of the ladder?

where are the vectors ?

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .

c) power lifting, will be your answer.

,

deku ❤

at right angles to each other