本课配套习题挑战模式1/5
A: 网球下落时,动能减小,重力势能增大 |
B: 网球在上升过程中,动能不变,重力势能增大 |
C: 网球落下撞在地面时,动能转化为弹性势能 |
D: 网球飞来撞击李娜的球拍时,弹性势能转化为动能 |
- 提示1:IOi0qOmHj+i2iuWkp++8jOmAn+W6pui2iuWkp++8jOWKqOiDvei2iuWkp+OAgg==
- 提示2:IOmHjeWKm+WKv+iDveS4jui0qOmHj+WSjOmrmOW6puacieWFs+OAgg==
- 提示3:IOW8ueaAp+WKv+iDveS4juW9ouWPmOeoi+W6puacieWFs+OAgg==
- 答案:Qw==
PGRpdj5B77ya5LiL6JC95pe277yM5bqU6K+l5piv5Yqo6IO95aKe5aSn77yM6YeN5Yqb5Yq/6IO95YeP5bCP44CCQu+8muS4iuWNh+i/h+eoi+S4re+8jOWKqOiDveWHj+Wwj+OAgkPvvJrmkp7lh7vlnLDpnaLml7bvvIzliqjog73lh4/lsI/vvIznmq7nkIPlvaLlj5jlop7lpKfvvIzliqjog73ovazljJbkuLrlvLnmgKflir/og73jgIJE77ya6K+05Y+N5LqG44CCPC9kaXY+
本课配套习题挑战模式2/5
竖直向上抛出的篮球,离开手后会继续向上运动,若不考虑空气阻力,则在上升的过程中,篮球的( )
A: 动能增大,重力势能增大 |
B: 动能减少,重力势能增大 |
C: 动能保持不变,重力势能保持不变 |
D: 机械能保持不变 |
- 提示1:PHA+6LSo6YeP6LaK5aSn77yM6YCf5bqm6LaK5aSn77yM5Yqo6IO96LaK5aSn44CCPC9wPg==
- 提示2:PHA+6YeN5Yqb5Yq/6IO95LiO6LSo6YeP5ZKM6auY5bqm5pyJ5YWz44CCPC9wPg==
- 提示3:PHA+5Yqo6IO95ZKM5Yq/6IO96YCa56ew5Li65py65qKw6IO944CC5b+955Wl6Zi75Yqb77yM5py65qKw6IO95a6I5oGS44CCPGJyPjwvcD4=
- 答案:QixE
PGRpdj7kuIrljYfov4fnqIvkuK3vvIznr67nkIPnmoTpgJ/luqblh4/lsI/vvIzmiYDku6Xliqjog73lh4/lsI/vvIzpq5jluqblop7lpKfvvIzmiYDku6Xph43lipvlir/og73lop7lpKfjgILov5nkuKrov4fnqIvvvIzliqjog73ovazljJbkuLrph43lipvlir/og73jgILlv73nlaXpmLvlipvvvIzmnLrmorDog73lrojmgZLjgII8YnI+PC9kaXY+PGRpdj7miYDku6XmraPnoa7nrZTmoYjkuLrvvJpCRDxicj48L2Rpdj4=
本课配套习题挑战模式3/5
A: 拉弯的弓把箭射出去 |
B: 秋千从低处荡向高处 |
C: 冰雹从天而降 |
D: 向上抛出的石块在空中先上升后下降 |
- 提示1:IOaLieW8r+eahOW8k+WwhOWHuueureeahOi/h+eoi++8jOaYr+aKiuW8ueaAp+WKv+iDvei9rOWMluS4uuWKqOiDveeahOi/h+eoiw==
- 提示2:IOeni+WNg+S7juS9juWkhOiNoeWQkemrmOWkhO+8jOaYr+WKqOiDvei9rOWMluS4uumHjeWKm+WKv+iDveOAgg==
- 提示3:IOWQkeS4iuaKm+WHuueahOefs+Wdl+WcqOepuuS4reWFiOS4iuWNh+WQjuS4i+mZje+8jOacieS4iuWNh+WSjOS4i+mZjeS4pOS4qui/h+eoiw==
- 答案:Qg==
PGRpdj7mi4nlvK/nmoTlvJPlsITlh7rnrq3nmoTov4fnqIvvvIzmmK/miorlvLnmgKflir/og73ovazljJbkuLrliqjog73nmoTov4fnqIvvvIznp4vljYPku47kvY7lpITojaHlkJHpq5jlpITvvIzmmK/liqjog73ovazljJbkuLrph43lipvlir/og73jgILlhrDpm7nkuIvokL3ov4fnqIvkuK3vvIzph43lipvlir/og73ovazljJbkuLrliqjog73jgILlkJHkuIrmipvlh7rnmoTnn7PlnZflnKjnqbrkuK3lhYjkuIrljYflkI7kuIvpmY3vvIzmnInkuIrljYflkozkuIvpmY3kuKTkuKrov4fnqIvvvIzkuIrljYfml7bliqjog73ovazljJbkuLrph43lipvlir/og73vvIzkuIvpmY3ml7bvvIzph43lipvlir/og73ovazljJbkuLrliqjog73jgII8L2Rpdj4=
本课配套习题挑战模式4/5
A: 忽略空气阻力,小球上下运动的过程中,动能大小不变 |
B: 小球上升过程中,动能大小不变 |
C: 忽略空气阻力,小球上下运动的过程中,机械能不变 |
D: 小球从最高点下降到最低点的过程中,动能不断增大 |
- 提示1:IOmAn+W6puaUueWPmO+8jOWKqOiDveWwseaUueWPmOOAgg==
- 提示2:IOW/veeVpemYu+WKm++8jOacuuaisOiDveS4jeWPmOOAgg==
- 提示3:IOWwj+eQg+S7juacgOmrmOeCueS4i+mZjeWIsOacgOS9jueCueeahOi/h+eoi++8jOaYr+S4gOS4qumAn+W6puWFiOWinuWkp+WQjuWHj+Wwj+eahOi/h+eoi+OAguaJgOS7peWKqOiDveWFiOWinuWkp++8jOWQjuWHj+Wwj+OAgg==
- 答案:Qw==
PGRpdj7pgJ/luqbmlLnlj5jvvIzliqjog73lsLHmlLnlj5jjgIIg5b+955Wl6Zi75Yqb77yM5py65qKw6IO95LiN5Y+Y44CCIOWwj+eQg+S7juacgOmrmOeCueS4i+mZjeWIsOacgOS9jueCueeahOi/h+eoi++8jOaYr+S4gOS4qumAn+W6puWFiOWinuWkp+WQjuWHj+Wwj+eahOi/h+eoi+OAguaJgOS7peWKqOiDveWFiOWinuWkp++8jOWQjuWHj+Wwj+OAgjwvZGl2Pg==
本课配套习题挑战模式5/5
A: 铁锁摆回后一定能碰到鼻子 |
B: 铁锁下降过程中,重力势能转化为动能 |
C: 铁锁的机械能始终不变 |
D: 铁锁第一次摆动到最低点时,动能最大 |
- 提示1:IOmimOebruS4reayoeivtOW/veeVpemYu+WKm++8jOaJgOS7peimgeiAg+iZkeiDvemHj+eahOaNn+WksQ==
- 提示2:IOS4iuWNh+i/h+eoi+S4re+8jOWKqOiDvei9rOWMluS4uumHjeWKm+WKv+iDve+8jOS4i+mZjei/h+eoi+S4re+8jOmHjeWKm+WKv+iDvei9rOWMluS4uuWKqOiDveOAgg==
- 提示3:IOWcqOaRhuWKqOi/h+eoi+S4re+8jOacuuaisOiDvei2iuadpei2iuWwj+OAgg==
- 答案:QixE
PGRpdj7popjnm67kuK3msqHor7Tlv73nlaXpmLvlipvvvIzmiYDku6XopoHogIPomZHog73ph4/nmoTmjZ/lpLHvvIzkuIrljYfov4fnqIvkuK3vvIzliqjog73ovazljJbkuLrph43lipvlir/og73vvIzkuIvpmY3ov4fnqIvkuK3vvIzph43lipvlir/og73ovazljJbkuLrliqjog73jgILlnKjmkYbliqjov4fnqIvkuK3vvIzmnLrmorDog73otormnaXotorlsI/jgILmiYDku6XlnKjnrKzkuIDmrKHmkYbliqjliLDmnIDkvY7ngrnml7bvvIzliqjog73mnIDlpKfjgII8L2Rpdj4=