If you hit a tennis ball on a network. When the ball reaches its maximum height, the speed is?
The options are: less speed initial, g * t, equal to its initial report, Zero in a higher principle.
I think I left part of the question. Speed ball is a vector. When you hit the ball, the vector pointing upwards and forwards. Gravity pulls the vehicle down. Small forces (air friction, etc.) to slow in general, but assuming that these can be ignored. At some point, gravity will pull the car to point down instead of up. This is the maximum height. The horizontal component of velocity should not change (given our assumptions). There will always be ahead with the initial velocity. However, the component instantaenously vertical is zero. In an instant, the ball begins to accelerate vertically and continue to draw the vector below the horizontal line due to the strength of the gravity. If this was not true, the ball reaching the maximum height and then just fall from the sky (0 full speed) know not. Therefore, your choice, probably the same the initial or any degree that would be the first best. The same is true if, for example, a ball 10 feet and shoot from a height of 10 feet. The two runs in the same time.The the ball is the horizontal velocity does not affect the gravity pulling it upright. (yes little effect as the curvature of the earth resistance to wind, etc. are ignored).
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