Labels:text | cartoon | illustration OCR: . PRINCIPLES OF SCIENCE GEARS AND BELTS EAR WHEELS and wheels linked by I belts transfer movement from where L BELTS it is produced to where it is needed. Gears always touch and turn in opposite directions. Wheels linked by belts can be far apart and turn in the same direction. As different-sized wheels turn at different speeds, gears and belts can change the speed, force, and direction of a wheel's rotation. GEARS TO DRIVE WHEEL REDUCE SPEED GEARS TO INCREASE SPEED TEETH Types of Gears Related Machines
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