Labels:bulletin board | clock | grandstand | monitor | reckoner | sky | streetlight OCR: How op forces change velocity? The velocity of ball will only change force acts on This may seem strange ball that rolls along the floor will in time come to halt. However the ball stops because force called friction acting on it Without friction the ball would continue rolling at the same velocity until hit wall The idea that an object will only change its velocity 14a force acts on was first thought of by Sir Isaac Newton more than 1300 years ago rule 1c now known as "Newton's first law of motion
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