
help control the physics! A player hits a tennis ball 2.0 meters above the ground. The ball leaves his racquet with a?
A player hits a ball Track of 2.0 above the ground. The ball leaves his racquet with a speed of 20 to an angle of 5.0 over the crossbar. The horizontal distance to the network is 7.0, and the net is 1.0 high. The ball clear the net? If so, how? If not, why not?
First, suppose the following units (since gave only the number with appropriate units), where the ball is hit distance above the ground 2 meters = speed at which Leave racquet ball = 20 m / sec. distance horizontal of the ball must travel up to red = 7 m = 1 meter net working first equation is X = Vx (T) where X = horizontal distance of the ball must travel in the network = 7 m Vx = horizontal component of initial velocity = 20 * cos 5 = 19.92 T = time to reach the ball Solving the T, TT = 7/19.92 = 0.35 sec. Formula next job is Y = V (T) - (1 / 2) gt ^ 2, where Y = vertical distance dropped ball initial velocity component Vy = vertical = 20 sin * 5 = 1.74 m / sec. T = 0.35 s (as explained above) g = acceleration due to gravity = 9.8 m / s ^ 2 (constant) Substituting values, Y = 1.74 (0.35) - (1 / 2) (9.8) (0.35) ^ 2 Y = 0.009 m away from the ball on the ground to approach the network is D = 2 0.009 = 1.991 and since D> 1, when the ball crosses the net to 0991 m (1,991 to 1) Hope this helps.
Melnik:Racquet Ball to the Balls
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