Tue May 24, 2011 By: Saara Acharya

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

Expert Reply
Fri May 27, 2011

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

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