1.A ball is thrown into the air with an initial x velocity of 15 m/s and an initial y velocity 10 m/s from an initial height of 20 m. a) What is the maximum height of the ball? How long does it take the ball to reach its maximum height? b) What is the range of the bal?

2. At time t = 0, the vectors E andB are given by E vectors, Eo and Bo are fixed and orthogonal. The equations of motion are E, and B = Bo, where the unit %3D dE E +Bx E- dr dB B.+ Ex B. dt Find E and B at a general time t. showing that after a long time the directions of E and B have almost interchanged.

9. A boy wishes to throw a ball over a flat roofed school house that stands 12 m wide and 7.5 m high on level ground. Assuming that the ball will leave his hand at a height of 1.5 m above the ground, determine how far from the wall he should take his stand in order to make the ball clear the roof with least effort, that is, with minimum initial velocity. A. 4.4 m B. 2.1 m C. 7.4 m D. 8.1 m

Во Font Arial Bold B 2. In a basketball game, a player shoots the ball at a velocity of 4.31 m/s at 17.30 above the horizontal. A player on the other team jumps up and blocks the ball at the maximum height. A) Character How far horizontally does the ball travel to where it is blocked? B) How long is the ball in the air before being blocked C) If the ball wasn't blocked, what is the magnitude and direction of the velocity when the ball returns to the launch height? Explain' Alignment 73 Pictorial Representation am eee • Spacing 7 (31 hapt > Bullets & Lists +1 (31 / Did Mathematical Representation 22 Aa MacBook Pro F2 F3 DD F4 F5 F7 F8 F9 F10 F11 24 % & 4 7 8 E R U P ト 3.