A person weighing 150 pounds is lifted 200 feet by an elevator. Calculate the work done by the elevator in joules. Convert the Watts to horsepower. Mechanical Engineer Machines make work easier by changing the size or direction of a force. 2 forces are always involved when using a machine.
Work is done to a machine as well as by a machine.
I - the work done on a machine. When using a machine, distances are not the same. E - the distance through which the machine moves. MA is equal to 1 - the machine is used to change the direction of the effort force. MA is less than 1 - the machine is used to increase the distance an object moves or the speed at which it moves.