The simple machines usually increase work output compared to work input.

A. True
B. False

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Does heating a metal wire increase or decrease its electrical resistance? why?