高一物理题目16题求解 高一物理求解，16题，下图
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2动能定理：mgh+1/2*mv^2=1/2*mv2^2，v2=3√5m/s
3下落时间t，1/2*gt^2=h，t=√(0.2)。水平位移是vt=√0.2*5=2.2m。竖直位移是h=1m，则总位移是2.45m
绛旓細鍥炵瓟锛歴=1/2 a1 t2 a1=1 v1=a1t=2 s2=1/2(v1+0)t=4
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绛旓細1.瑙 鐢卞凡鐭ヤ笅钀戒簡4S s=2/1gt^2=0.5*9.8*16=78.4m 鏁呰窛绂诲湴闈㈤珮搴︿负78.4m+200m=278.4m 鐢眘=1/2gt^2寰 t=鏍瑰彿(2s/g)=7.54s 2.瑙 褰撴苯杞﹀仠涓嬫潵鎵鐢ㄧ殑鏃堕棿涓 t=v/a=10/4=2.5s 鎵璧拌窛绂讳负 s=1/2at^2=0.5*4*2.5^2=12.5m 杩欎釜杩囩▼涓嚜琛岃溅鎵琛岃蛋鐨勮窛绂讳负 s=vt=...
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