Amachine is device a. changes either the magnitude or direction of force b. always makes lifting object require more effort c. changes only magnitude of the force d. changes only direction of the force which of the following listed is a simple machine? a. a car b. an inclined plane c. a bicycle d. a chair which two simple machines are modified versions of an inclined plane? a. wedge an screw b. lever and pulley c. wheel and axle d. wedge and pulley

A machine, a simple machine, to be specific is a device that changes either the magnitude or direction of force. It uses mechanical advantage to multiply force. Simple machines transform energy into work. 

The answer would then be letter A.

There are six simple machines, which are pulley, lever, inclined plane, wheel and axle, screw and wedge. The answer is inclined plane as listed above. the other choices are complex machines that are simple machines combined. 

The answer would then be B.

A screw is a simple machine which is a modified version of an inclined plane. It is an inclined plane that circles around a central point. Another one would be the wedge. The wedge is an inclined plane that is moved using something else like an axe. 

The answer is then A. 

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