Suppose a scrawny 20. kg Wyle was shot straight up with an initial velocity of +50 m/s.   a.    Assuming that all his initial Ek was transformed into Eg, what is the maximum height he could reach?

b.    Suppose that 20% of his initial Ek were lost due to friction with the air (air resistance). 
What is the maximum height he could reach?

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Matt is driving down 7th street. he drives 150 meters in 18 sec. assuming he doesn’t slow down or speed up, what is his speed?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e