From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 8.00 m/s and angle of 20.0 below the horizontal. It strikes the ground 3.00 s later. (a) If the base of the building is taken to be the origin of the coordinates, with upward the positive y-direction, what are the initial coordinates of the ball? (b) With the positive x-direction chosen to be out the window, fi nd the x- and y-components of the initial velocity. (c) Find the equations for the x- and ycomponents of the position as functions of time. (d) How far horizontally from the base of the building does the ball strike the ground? (e) Find the height from which the ball was thrown. (f) How long does it take the ball to reach a point 10.0 m below the level of launching?
PHYS 242 BLOCK 1, PART 2, NOTES Sections 22.2 to 22.5 Theelectric fΦExthrough a surface is related to the electricfield lines. Although we can draw as many electric field lines as we want to represent the electric field, the electric flux has a definite value. → Special case 1.If E is uniform (that is, constant in both magnitudflat surface of areaA is → N·m 2 perpendicular to E as shown in Fig. 2Φ.E= EA (in C ). Special case 2.If E is uniform over aflat surface of areaA, with an angleφ shΦwn=in Fig. 22.6b, then E EA⊥,whereA⊥= A cos φ. hatisΦE = EA cos φ . Usi