Why is velocity alone negative if a ball is thrown upwards...
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1
the velocity is negative because the ball is thrown upwards and the velocity is decreasing and it is in the opposite direction of the motion
sahaj55:
g is positive and in free fall the body falls in downward direction so,it is positive
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We generally consider upward direction as positive.
So when a ball is thrown upward, while the ball is going up,
=> the velocity is taken as positive.
=> Displacement happens in the upward direction. So displacement is also positive
=> acceleration due to gravity is acting downward(always). So g is taken as negative.
=> time is always positive.
So when a ball is thrown upward, while the ball is going up,
=> the velocity is taken as positive.
=> Displacement happens in the upward direction. So displacement is also positive
=> acceleration due to gravity is acting downward(always). So g is taken as negative.
=> time is always positive.
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