Q1)Serving at a speed of 171 km/h, a tennis player hits the ball at a height of 2.51 m and an angle θ below the horizontal. The player serves at a distance of 12.0 m from the net, which is 0.91 m high. A. What is the angle θ such that the ball just crosses the net? B. The out line of the service box is 6.40 m from the net. How far does the ball land from the out line of the service box? (If the ball lands outside the out line, enter your answer as a positive number. If inside, enter as a negative number.)

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