Question
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.
Compute the dog's change in velocity.
Compute its average acceleration.
Answers
drwls
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)
Acceleration = (-9.3 m/s)/3.0s = -3.1 m/s^2
(minus means backwards compared to the +y direction)