a winch is used to vertically pick up a 4000 kg create a total distance of 3.8 M if it took 185 s to pick up the crate how much power was the winch supplying

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?