Suggested in the bad day thread, moving all my physics woes here.
The next test is in a few days and I have no idea how to do even the basic concepts. This has to do with speed, velocity, acceleration, etc, graphs based on them, and word problems. I'm having trouble even with what was taught on day one. I hate.
Anyway.
Examples of the simple problems I should know how to do but don't:
-- Lance Armstrong decides to go for a bike ride. He starts at a speed of 10 m/s, but then decides to go downhill. Downhill he speeds up at a constant rate. His overall descent is 150m and takes him 10s.
------- How fast is he going at the end?
------- By what amount did his velocity increase every second?
-- You hike 2/3 up a mountain at a speed of 3mi/hr and run the final third at 6mi/hr. Average speed?
-- a horse moves away from its trainer in a straight line, 116m away in 14s. It turns and gallops halfway back in 4.8s. Calculate average speed, and average velocity, away is positive.
Some more complex things:
-- A falling stone takes .28s to travel past a window 2.2 m tall. From what height above the top of the window did it fall?
I'll put more up later, my hand hurts but yeah. I'm so confused.