mam, can u plz explain by giving eg, that how only that object speeds up which has either both +ve velocity and acceleration or both are -ve velocity and acceleration

Asked by akkisara | 24th May, 2011, 12:00: AM

Expert Answer:

example where both the velocity and acceleration are negative.

 

Assume the the positive direction is up

You can throw a stone straight up, when it eventually comes down its velocity points downward, thus is negative; and its acceleration 9.8 m/s2, also negative. And we find the stone speeds up.

Examples of positive velocity and positive acceleration where the object speeds up is


Answered by  | 27th May, 2011, 12:54: AM

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