Question

**2.** *(15pts, 5pts
each)* A ball is thrown from the top of a building that is
*H* = 40 m height. It has an initial velocity
*v*_{0} that is at angle
of = 53° below the horizontal direction, as shown in the
below Figure. The ball hits the ground *t* = 2.0 s after being
thrown. You may neglect air resistance.

a) Find the *magnitude* of the *initial velocity*
*v*_{0} of the ball.

b) Find the *velocity* of the ball just before it hits the
ground at 2 s.

*c) Sketch graphs* of *x-position* vs. *time* (*x
vs. t*), *y-position* vs. *time* (*y vs. t*),
*x-velocity* vs. *time* (*v*_{x} *vs. t*) and *y-velocity*
vs. *time* (*v*_{y}
*vs. t*) for the motion of the ball while it is in the
air.

Answer #1

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