一道有关斜抛的英语物理题.重分酬谢Pitcher'smoundsareraisedtocompensatefortheverticaldropoftheballasittravelsahorizontaldistanceof18mtothecatcher.a)Ifapitchisthrownhorizontallywithaninitalspeedof32m/s,h

Question

一道有关斜抛的英语物理题.重分酬谢
Pitcher's mounds are raised to compensate for the vertical drop of the ball as it travels a horizontal distance of 18m to the catcher.a)If a pitch is thrown horizontally with an inital speed of 32m/s,how far does it drop by the time it reaches the catcher?b)If the speed of the pitch is increased,does the drop distance increase,decrease,or stay the same?Explain.c)If this baseball game were to be played on the Moon,would the drop distance increase,decrease,or stay the same?Explain.

Answer 1

第一问：同
这是一道简单的平抛运动
a 18/32=9/16(s) s=1/2*g*t^2=405/256(m)
第二问,投掷速度增大,接球手的位置是不变的,水平距离不会变化,则时间会缩短,而重力加速度不变,则下落距离会缩短.
第三问,月球的重力加速度比地球小,而其他都不变,所以下落距离会缩短.