At the time

t_(1)

, a velocity of an object is:

_(v_(i))

Then the velocity changes to: at time

r_(2)

.

v_(1)

and

v_(2)

have the same speed. "which one of the following represents the acceleration of the object between the two time

t_(1)

and

t_(2)

?\ a)\ b)\ c)\ d)

L