Aladder 10 ft long rests against a vertical wall. if the bottom of the ladder slides away from the wall at a rate of 1.1 ft/s, how fast is the angle between the ladder and the ground changing when the bottom of the ladder is 8 ft from the wall? (that is, find the angle's rate of change when the bottom of the ladder is 8 ft from the wall.) rad/s

Explanation:

As we know that the length of the ladder is given as

now at any instant of time let the ladder is at distance "x" from the vertical wall

then the angle made with the horizontal for the ladder is given as

now differentiate both sides with respect to time

so here we have

given that

now we have

cant without the picture! ?

3. dark matter

empty space could also be a simple vacuum