Homework Help: physics

Posted by Andrew on Sunday, October 31, 2010 at 9:09pm.

an object is initially moving 15.0 m/s. a minute later, it is moving 25.0 m/s in the opposite direction. What is the displacement and acceleration?

physics - Damon, Sunday, October 31, 2010 at 9:19pm
change in velocity = final - initial = -25 - 15 = -40
A = change in velocity/time = -40/60 m/s^2
= -2/3 m/s^2

average velocity = (15-25) /2 = - 10/2 = -5 m/s
displacement = average velocity*time = -5*60 = -300 meters

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