A quantity has the value of -16ms-2. it is the. a) Accention of an object. b) velocity of an object. c)retardation of an object. d) speed of an object
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During ascent ball is going upward therefore its position is positive. Now , though the velocity is decreasing but its direction is upward i.e. positive. Ball is moving under the effect of gravitational acceleration , which is always acting vertically downwards so it is negative.
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