what is -ve acceleration?????
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ve acceleration (under linear motion) is same as retardation (i.e. velocity of an object under negative accleration) will keep on decreasing. whereas under +ve acceleration, velocity should keep on increasing.
Another way of looking it is: , if the motion of the object is opposite to the direction of 'acceleration' then acceleration is taken as -ve (e.g. object is moving up under gravity, so gravitational accln is opposite (i.e. downward) to the direction of motion (which is upward) hence sccln = -g and if acceleration is in same direction as of motion, it is taken as +ve
Another way of looking it is: , if the motion of the object is opposite to the direction of 'acceleration' then acceleration is taken as -ve (e.g. object is moving up under gravity, so gravitational accln is opposite (i.e. downward) to the direction of motion (which is upward) hence sccln = -g and if acceleration is in same direction as of motion, it is taken as +ve
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Retadation... That is the acceleration is taking place in the opposite direction of the given direction.. That is the acceleration is in negative value
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