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    problem related to laws of motion?

    Laws of motion:problem? 5.5) a constsnt retarding force of 50N is applied to a body of mass 20kg. moving initially with a speed of 15m/s.How long does the body take to stop? 5.6)a constant force acting on a body of mass 3kg changes its speed from 2m/s to 3.5 m/s in 25s.The direction of motion of...
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    car with speed 27km/hr reaches a turn of 80m radius.driver reduces the speed by

    .5m/s on each sec. Find net a? THE SPEED IS REDUCED BY APPLYING BREAK,AND IS BY A RATE OF .5M/S IN EVERY SECOND.FIND THE NET ACCELERATION AT THE CIRCULAR CURVE?
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