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You serve a tennis ball from a heigth of 1.8 m above the ground. The ball leaves your racket with a speed of 17.9 m/s at an angle of 6.90degree above the horizontal. The horizontal distance from the court's baseline to net is 11.87 m, and the net is 1.07 m high. Neglect spin imparted on the ball as well as air resistance effects.
Does the ball clear the net?
If yes, by how much? if not, by how much?
A ray of light strikes a plane mirror at a 45° angle of incidence. The mirror is then rotated by 23° in the clockwise direction, while the incident ray is kept fixed. (a) Through what angle does the reflected ray rotate? (b) What is the answer to par..
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