Answers

2015-07-10T17:25:41+05:30
When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has anegative velocity) and is slowing down.
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2015-07-10T19:56:03+05:30
Acceleration of a body is negative when it is opposite to the direction of velocity
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