Homework Help: Physics

Posted by Tig on Thursday, February 9, 2012 at 12:05am.

A dog running in the +y-direction at 6.6m/s hears its owner call from behind, and 3.0secs later it's running at the same speed in the opposite direction.

Compute the dog's change in velocity.
Compute its average acceleration.

Physics - drwls, Thursday, February 9, 2012 at 12:33am
Change in velocity = -3 - 6.6 = -9.3 m/s

Acceleration = (-9.3 m/s)/3.0s = -3.1 m/s^2
(minus means backwards compared to the +y direction)

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