本课配套习题挑战模式1/5
置于水平地面上的物体在沿水平方向的拉力作用下,仍处于静止,则物体所受静摩擦力的大小( )
A: 与压力成正比 |
B: 等于水平拉力 |
C: 小于滑动摩擦力 |
D: 在物体上叠放另一物体,该物体受到的静摩擦力变大 |
- 提示1:PHA+54mp5L2T5aSE5LqO6Z2Z5q2i54q25oCB77yM5YiZ5Y+X5Yqb5bmz6KGh77yM5qC55o2u5LqM5Yqb5bmz6KGh55qE5p2h5Lu277ya5aSn5bCP55u4562J44CB5pa55ZCR55u45Y+N44CB5ZCM5LiA55u057q/77yM5ZCM5LiA54mp5L2T77yM5Yik5pat5pGp5pOm5Yqb55qE5aSn5bCPPC9wPg==
- 答案:Qg==
PGRpdj48cD7lm6DkuLrniankvZPlp4vnu4jpnZnmraLvvIzlubbkuJTniankvZPlnKjmsLTlubPmlrnlkJHlj6rlj5fmsLTlubPmi4nlipvlkozmkanmk6blipvkvZznlKjvvIzmlYXmi4nlipvlkozmkanmk6blipvmmK/kuIDlr7nlubPooaHlipvvvIzlnKjniankvZPkuIrlj6DmlL7lj6bkuIDniankvZPvvIzor6XniankvZPlj5fliLDnmoTpnZnmkanmk6blipvku43nhLbnrYnkuo7msLTlubPmi4nlipvvvIzljbPniankvZPmiYDlj5fnmoTpnZnmkanmk6blipvnrYnkuo7msLTlubPmi4nlipvvvI48L3A+PHA+5pWF6YCJQjxicj48L3A+PC9kaXY+
本课配套习题挑战模式2/5
如图所示,一木块放在水平桌面上,在水平方向共受到F1、F2和摩擦力作用(最大静摩擦力等于滑动摩擦力),木块处于静止状态,其中F1=10N,F2=7N.若撤去F1,木块仍静止,则木块在水平方向受到的合力可能为( )
A: 10 N,方向向左 |
B: 7 N,方向向右 |
C: 2 N,方向向左 |
D: 零 |
- 提示1:PHA+5pyo5Z2X5LuN6Z2Z5q2i77yM5YiZ5Y+X5Yqb5bmz6KGh77yM5ZCI5Yqb5Li66Zu2PGJyPjwvcD4=
- 答案:RA==
PGRpdj7mnKjlnZfku43pnZnmraLvvIzliJnlj5flipvlubPooaHvvIzlkIjlipvkuLrpm7bvvIxE6YCJ6aG55q2j56GuPGJyPjwvZGl2Pg==
本课配套习题挑战模式3/5
A重5N,物B重10N,现用对A施加一水平推力F=100N,将A、B压在竖直墙壁上静止,如图所示,则B的左表面所受的静摩擦力大小和方向为( )
A: 5N、竖直向上 |
B: 5N、竖直向下 |
C: 10N、竖直向上 |
D: 10N、竖直向下 |
- 提示1:PHA+5pys6aKY5bqU5LulQeS4uueglOeptuWvueixoe+8jOeUseS6jOWKm+W5s+ihoeWPr+axguW+l0HmiYDlj5fmkanmk6blipvvvIzlho3nlLHkvZznlKjlipvlj4rlj43kvZznlKjlipvmsYLlvpdC5omA5Y+X5pGp5pOm5YqbPC9wPg==
- 答案:Qg==
PGRpdj48cD5B5Zyo56uW55u05pa55ZCR5LiK5Y+X6YeN5Yqb44CB5pGp5pOm5Yqb6ICM5aSE5LqO6Z2Z5q2i54q25oCB77yM5pWFQeaJgOWPl+aRqeaTpuWKm+W6lOetieS6jumHjeWKm++8jOWNs0Y8c3ViPmY8L3N1Yj49RzxzdWI+QTwvc3ViPj01Tu+8jEHmiYDlj5fmkanmk6blipvmlrnlkJHlkJHkuIrvvJsg5ZugQeWvuULnmoTkvZznlKjlipvkuI5C5a+5QeeahOS9nOeUqOWKm+S4uuWkp+Wwj+ebuOetie+8jOaWueWQkeebuOWPje+8jOaVhULmiYDlj5fmkanmk6blipvkuLo1Tu+8jOaWueWQkeebuOS4i++8mzwvcD48cD7mlYXpgIlCPGJyPjwvcD48L2Rpdj4=
本课配套习题挑战模式4/5
重100N的物体,静止在粗糙水平面上,当物体同时受到一个向右F1=20N和向左F2=50N的两个力作用一段时间后,物体做匀速直线运动,水平面对物体的摩擦力大小和方向是( )
A: 30N,水平向左 |
B: 30N,水平向右 |
C: 20N,水平向左 |
D: 20N,水平向右 |
- 提示1:PHA+5a+554mp5L2T5Y+X5Yqb5YiG5p6Q77yM5Y+X6YeN5Yqb44CB5pSv5oyB5Yqb44CB5o6o5YqbRjxzdWI+MTwvc3ViPuWSjEY8c3ViPjI8L3N1Yj7jgIHmkanmk6blipvvvIzmoLnmja7lj5flipvmsYLop6Pmu5Hliqjmkanmk6blips8YnI+PC9wPg==
- 答案:Qg==
PGRpdj48cD7op6PvvJrniankvZPlkIzml7blj5fliLDkuIDkuKrlkJHlj7NGPHN1Yj4xPC9zdWI+PTIwTuWSjOWQkeW3pkY8c3ViPjI8L3N1Yj49NTBO55qE5Lik5Liq5Yqb77yM5o6o5Yqb55qE5ZCI5Yqb5Li6MzBO77yM5ZCR5bem77yb54mp5L2T5YGa5YyA6YCf55u057q/6L+Q5Yqo77yM5YiZ5Y+X5Yqb5bmz6KGh77yM5Y+v5b6X5ruR5Yqo5pGp5pOm5Yqb55qE5pa55ZCR5ZCR5Y+z77yM5aSn5bCP562J5LqO5o6o5Yqb55qE5ZCI5YqbMzBOPGJyPjwvcD48L2Rpdj4=
本课配套习题挑战模式5/5
如图所示,在水平地面上放置两个物体A、B,已知A、B与地面的滑动摩擦力分别为10N和5N,若沿水平向右的方向F=15N的力推物体A时,两物体同时向前做匀速运动,A、B受到地面的摩擦力分别为( )
A: 15N,15N |
B: 10N,5N |
C: 10N,10N |
D: 10N,0N |
- 提示1:PHA+5pys6aKY5LuO5Y+X5Yqb5YiG5p6Q57uT5ZCI5bmz6KGh5Yqb5Ye65Y+R5Y2z5Y+v6Kej6aKYPC9wPg==
- 答案:Qg==
PGRpdj48cD5BQuWFseWQjOWQkeWJjeWBmuWMgOmAn+i/kOWKqO+8jOWPl+WKm+W5s+ihoe+8jOaOqOWKm+S4ujE1Tu+8jOWImeaRqeaTpuWKm+Wkp+Wwj+S4ujE1Tu+8jEHjgIFC5LiO5Zyw6Z2i55qE5ruR5Yqo6Z2Z5pGp5pOm5Yqb5YiG5Yir5Li6MTBO5ZKMNU7vvIzlkIToh6rliIbmnpDvvIzlj6/nn6VB5omA5Y+X5ruR5Yqo5pGp5pOm5aSn5bCP5Li6MTBO77yMQuaJgOWPl+aRqeaTpuWKm+eahOWkp+Wwj+S4ujVO77yM5YiZQuato+ehrjwvcD48L2Rpdj4=