本课配套习题挑战模式1/5
关于运动和力,正确的说法是( )
A: 物体必须受到力的作用才能运动 |
B: 物体运动不需要受力 |
C: 物体受到力的作用时就会运动 |
D: 物体只要运动就一定受到力 |
- 提示1:PHA+5Yqb5piv5pS55Y+Y54mp5L2T6L+Q5Yqo54q25oCB55qE5Y6f5ZugPC9wPg==
- 答案:Qg==
PGRpdj7niankvZPlnKjkuI3lj5flipvnmoTmg4XlhrXkuIvvvIzlj6/ku6XpnZnmraLmiJbogIXlgZrljIDpgJ/nm7Tnur/ov5DliqjvvIxB44CBQ+OAgUTplJnor6/vvIxC5q2j56GuPGJyPjwvZGl2Pg==
本课配套习题挑战模式2/5
A: 没有力作用在物体上,物体就不运动 |
B: 只要有力作用在物体上,物体就一定运动 |
C: 物体在几个力作用下,运动状态一定要发生变化 |
D: 物体在几个力作用下,也可能静止不动 |
- 提示1:IOWKm+S4jeaYr+e7tOaMgeeJqeS9k+i/kOWKqOeKtuaAgeeahOWOn+WboO+8jOWKm+aYr+aUueWPmOeJqeS9k+i/kOWKqOeKtuaAgeeahOWOn+WboA==
- 答案:RA==
PGRpdj5B54mp5L2T5Y+X5Yqb5bmz6KGh5Lmf5Y+v5Lul6Z2Z5q2i77ybQueJqeS9k+WPl+WKm++8jOS9huaYr+WQiOWkluWKm+S4uumbtu+8jOeJqeS9k+S5n+WPr+S7pei/kOWKqO+8jOS4lOaYr+WMgOmAn+ebtOe6v+i/kOWKqO+8m0PniankvZPlnKjlh6DkuKrlipvnmoTkvZznlKjkuIvvvIzlpoLmnpzov5nlh6DkuKrlipvlubPooaHvvIzniankvZPnmoTnirbmgIHkuI3lj5jvvJtE5ZCMQzwvZGl2Pg==
本课配套习题挑战模式3/5
A: 物体不受力,就不会运动 |
B: 运动的物体一定受到了力的作用 |
C: 一个做减速运动的物体,一定受到了力的作用 |
D: 一物体做曲线运动,如果运动的快慢不变,这个物体一定不受力或受平衡力 |
- 提示1:IOWKm+S4jeaYr+e7tOaMgeeJqeS9k+i/kOWKqOeKtuaAgeeahOWOn+WboO+8jOWKm+aYr+aUueWPmOeJqeS9k+i/kOWKqOeKtuaAgeeahOWOn+WboA==
- 答案:Qw==
PGRpdj7niankvZPkuI3lj5flipvvvIzlsIbkv53mjIHljp/mnInnmoTpnZnmraLnirbmgIHmiJbogIXljIDpgJ/nm7Tnur/ov5DliqjnirbmgIHvvIxB44CBQumUmeivr++8m+eJqeS9k+WBmuWHj+mAn+i/kOWKqO+8jOWImeeKtuaAgeaUueWPmO+8jOWImeeJqeS9k+S4gOWumuWPl+WKm++8jEPmraPnoa7vvJvniankvZPlgZrmm7Lnur/ov5DliqjvvIzov5DliqjmlrnlkJHmlLnlj5jvvIzljbPov5DliqjnirbmgIHmlLnlj5jvvIzliJnniankvZPkuIDlrprlj5flipvvvIzkuJTlj5flipvkuI3lubPooaHvvIxE6ZSZ6K+vPC9kaXY+
本课配套习题挑战模式4/5
关于运动和力,正确的说法是( )
A: 物体速度为零时,合外力一定为零 |
B: 物体作曲线运动,合外力可能是变力 |
C: 物体作直线运动,合外力一定是恒力 |
D: 物体作匀速运动,合外力一定为零 |
- 提示1:PHA+5Yqb5LiN5piv57u05oyB54mp5L2T54q25oCB55qE5Y6f5Zug77yM5Yqb5piv5pS55Y+Y54mp5L2T54q25oCB55qE5Y6f5ZugPC9wPg==
- 答案:Qg==
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
本课配套习题挑战模式5/5
运动和力,下列说法正确的是( )
A: 物体受到恒定的合外力作用时,它一定做匀加速直线运动 |
B: 物体受到变化的合外力作用时,它运动速度的大小一定改变 |
C: 物体做匀速圆周运动,则物体可能不受力的作用 |
D: 所有做曲线运动的物体,一定是受到力的作用 |
- 提示1:PHA+5Yqb5LiN5piv57u05oyB54mp5L2T54q25oCB55qE5Y6f5Zug77yM5Yqb5piv5pS55Y+Y54mp5L2T54q25oCB55qE5Y6f5ZugPC9wPg==
- 答案:RA==
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