State with reasons, if it is possible or impossible, for an object in motion to have:
(i) Acceleration opposite to the direction of motion.
(ii) Positive acceleration while speeding up.
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( i) Acceleration opposite to the direction of motion. If a body motion is slowing down then the acceleration is in same direction but the change in the velocity in opposite direction to that of the motion of the body.
(ii)When an object is thrown upward, at the highest point its velocity becomes zero for a slice of time, but its acceleration (g) remains due to attraction of gravity. Reason : When a moving car applies the break its velocity decreases.
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