Could I take eighth grade online at home?

Impossible Physics Take Home Test (Grade Level 10)?

(My new physics teacher was educated in Germany and he's kind of an ***. Good luck, any help will be much appreciated. Please include any possible explanations, and no links lol) 1. A ball is thrown vertically upward with an initial speed of V from a height of 50m above the ground.It takes 20 seconds total for the ball to reach maximum height and then hit the ground. The acceleration is constant and of magnitude -4m/s^2 a. find V (initial velocity) b. find maximum height it will reach from ground. (I'm pretty sure there are too many unknowns to make this question possible, but hey i'm just a 10th grader...) 3. A car is moving with a parametric equation of y= -1t^2 <OVER> 2+ 20t or Y= - 1t^2 / 2+ 20t a.find speed after 5 seconds b.does the car accelerate or decelerate its motion c.how long does it take the car to stop d.find the acceleration of the car at that instant e.what will the acceleration of the car be after 5 minutes?
Answer:

http://www.wolframalpha.com/

mtheoryr... at Yahoo! Answers Visit the source

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