A 17 ft ladder is leaning against a wall and sliding towards the floor. The top of the ladder is sliding down the wall at a rate of 6 ft/sec. How fast is the base of the ladder sliding away from the wall when the base of the ladder is 15 ft from the wall?

ft/s

Explanation:

We are given that

Length  of ladder,z=17 ft

Let x be the distance of bottom of ladder from the wall and y be the distance of the top of  ladder from the bottom of wall.

We have to find the rate at which the base of the ladder sliding away from the wall when x=15 ft

ft

Differentiate w.r. t time

ft/s

50 inches should be the resultant vector

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )