# Posts by Tig

Total # Posts: 5

**Physics**

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**

You hit a tennis ball from just above the ground. It leaves the racket at 15m/s going 10 degrees upward. Does the ball land before reaching the baseline at the other end of the court, 25m away? Yes, It does land within the court. If you struck the ball harder but at the same ...

**Physics**

A runner completes an 850m race with two laps of the 425m track in the x-y plane centered at the origin in 1 mins, 50.6s . A runner rounds the track counterclockwise starting at the point (67.6 , 0). Find the runner's average velocity for the race. Find the runner's ...

**physics**

A circular racetrack with 250m radius lies in the x-y plane and is centered at the origin. A car rounds the track counterclockwise starting at the point (250m , 0). Find the total distance traveled after one-quarter lap. Find the total displacement after one-quarter lap. Find ...

**Physics**

On level ground, you stand 21.0m from the base of a tree and determine that the treetop is at 46 degrees above the horizontal, as measured from ground level. How tall is the tree?

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