1. what is the average acceleration of a subway train that speeds up from 9.6m/s to 12m/s in .8s on a straight track?
2. an acorn at rest falls from an oak tree. the acorn hits the ground with a velocity of 14.7m/s. how long did it take the acorn to land?
3. what force is necessary to accelerate a 1,250 kg car at a rate of 40m/s^2
4. the mass of a person that weighs 500 n is
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Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

What object a collides with object b and bounces back its final momentum is?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.