# Need help with Math homework

*label*Physics

*timer*Asked: Oct 29th, 2015

**Question description**

1. A dog runs down his driveway with an initial speed of 5.5 m/s for 8.4 seconds, then uniformely increases his speed to 10 m/s in 5 seconds. How far did he travel in meters during the first 8.4 seconds?

2. A dog runs down his driveway with an initial speed of 7.1 m/s for 8 s, then uniformly increases his speed to 10.3 m/s in 5.8 s.

What was his acceleration (in m/s2) during the 2nd part of the motion?

3. A physics student skis down a hill, accelerating at a constant 1.1 m/s2. If it takes her 11.7 s to reach the bottom, what is the length (in meters) of the slope?

4. A mountain goat starts a rock slide and the rocks crash down the slope 90.5 m. If the rocks reach the bottom in 6.2 s, what is their acceleration (in m/s2)?

5. A skateboarder starts from rest at the top of a ramp and accelerates down it at a rate of 4.5 m/s2. If it takes 3 seconds to get to the bottom of the ramp, how fast (in m/s) will he be going at the bottom?