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Physics Physics-the study of matter and energy and the interaction between the two through forces and motion. Careers in Physics • Aerospace Engineer-Homer H. • Camera Operator • Computer Repair Technician • Architect • HVAC Technicians • Electrician Forces and Motion • A force causes a resting object to move, or accelerates a moving object. Motion-a change of position • Speed – the distance an sv object moves in a particular amount of time. 60 miles/hour •Acceleration- changes in speed Friction • A force that opposed the motion of objects Gravity • Force that causes objects to accelerate downward toward the center of the earth. Work, Power and Machines Work • Force acting on an object in the same direction the object moves. Work=force x distance Power • Work done in a given time Power = work time Machines • Help us do work! Simple Machines • Levers - crowbar • Wheel & axle – steering wheel • Inclined plane - ramp • Wedges - knife • Screws • Pulleys-flagpole, window blinds Compound Machines • When 2 or more simple machines work together. - car, bicycle, clock etc.
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