本课配套习题挑战模式1/5
A: 做功越多的机器,其功率一定越大 |
B: 行驶的汽车,在发动机输出功率一定的情况下,速度越大,牵引力越大 |
C: 做功越少的机器,其功率一定越小 |
D: 做功越快的机器,功率越大 |
- 提示1:IOeJqeS9k+WNleS9jeaXtumXtOWGheaJgOWBmueahOWKn+WPq+WKn+eOh++8mw==
- 提示2:IOeUseWFrOW8j1A9Rnblj6/nn6XvvIzlvZPmsb3ovabovpPlh7rlip/njofkuIDlrprml7bvvIznibXlvJXlipvkuI7msb3ovabnmoTpgJ/luqbmiJDlj43mr5Q=
- 答案:RA==
PGRpdj7niankvZPljZXkvY3ml7bpl7TlhoXmiYDlgZrnmoTlip/lj6vlip/njofvvJvlip/njofot5/niankvZPljZXkvY3ml7bpl7TmiYDlgZrnmoTlip/mnInlhbPvvIzpgInpoblB44CBQ+mUmeivr++8jETmraPnoa7vvJvnlLHlhazlvI9QPUZ25Y+v55+l77yM5b2T5rG96L2m6L6T5Ye65Yqf546H5LiA5a6a5pe277yM54m15byV5Yqb5LiO5rG96L2m55qE6YCf5bqm5oiQ5Y+N5q+U77yMQumUmeivr++8mzwvZGl2Pg==
本课配套习题挑战模式2/5
A: 只有① |
B: 只有①② |
C: 只有②③ |
D: ①②③都可以 |
- 提示1:IOa1i+mHj+WHuuWQhOiHqueahOS9k+mHjeOAgeeIrOalvOeUqOeahOaXtumXtOWSjOeIrOalvOeahOmrmOW6pu+8jOWNs+WPr+W+l+WHuueIrOalvOeahOWKn+eOh+W5tui/m+ihjOavlOi+gw==
- 提示2:IOWBmuWKn+aXtumXtOS4gOWumu+8jOavlOi+g+WBmuWKn+eahOWkmuWwke+8jOWBmuWKn+WkmueahO+8jOWKn+eOh+Wkpw==
- 提示3:IOWBmuWKn+eahOWkmuWwkeS4gOWumu+8jOWBmuWKn+aXtumXtOefreeahO+8jOWKn+eOh+Wkpw==
- 答案:RA==
PGRpdj7mr5TovoPlip/njofnmoTlpKflsI/mnInkuInnp43mlrnms5XvvJox44CB5rWL6YeP5Ye65ZCE6Ieq55qE5L2T6YeN44CB54is5qW855So55qE5pe26Ze05ZKM54is5qW855qE6auY5bqm77yM5Y2z5Y+v5b6X5Ye654is5qW855qE5Yqf546H5bm26L+b6KGM5q+U6L6D77yMMuOAgeWBmuWKn+aXtumXtOS4gOWumu+8jOavlOi+g+WBmuWKn+eahOWkmuWwke+8jOWBmuWKn+WkmueahO+8jOWKn+eOh+Wkp++8jDPjgIHlgZrlip/nmoTlpJrlsJHkuIDlrprvvIzlgZrlip/ml7bpl7Tnn63nmoTvvIzlip/njoflpKfvvIzliJlE6YCJ6aG55q2j56GuPC9kaXY+
本课配套习题挑战模式3/5
如图所示,在水平拉力F的作用下,使物体沿水平面作匀速直线运动, 不计绳重、绳与轴之间的摩擦,已知物体与地面间的摩擦力为10N,物体运动的速度为2m/s,则拉力做功的功率大小为( )
A: 10W |
B: 5W |
C: 20W |
D: 40W |
- 提示1:PHA+5Yqf546HUD1Gwrd2PC9wPg==
- 提示2:PHA+5a6a5ruR6L2u5Lit77yM5ouJ5Yqb55qE5aSn5bCP562J5LqO5pGp5pOm5Yqb55qE5aSn5bCP77yM54mp5L2T6L+Q5Yqo55qE6YCf5bqm562J5LqO57uz5a2Q56uv55qE6YCf5bqmPC9wPg==
- 答案:Qw==
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
本课配套习题挑战模式4/5
A: P甲>P乙 |
B: P甲<P乙 |
C: P甲=P乙 |
D: 条件不足无法判断 |
- 提示1:IOWKn+eOh+aYr+aMh+WNleS9jeaXtumXtOWGheaJgOWBmueahOWKnw==
- 答案:QQ==
PGRpdj7lip/njofmmK/mjIfljZXkvY3ml7bpl7TlhoXmiYDlgZrnmoTlip/vvIzml7bpl7TkuIDlrprvvIzlgZrnmoTlip/otorlpJrvvIzku6Pooajlip/njofotorlpKfvvIzliJnlj6/nn6VB5q2j56GuPC9kaXY+
本课配套习题挑战模式5/5
A: 两车所做的功之比为2:1 |
B: 两车所做的功之比为1:1 |
C: 两车所受牵引力之比为1:2 |
D: 两车所受牵引力之比为2:1 |
- 提示1:IOWKn1c9UHQ=
- 提示2:IOWKn+eOh1A9RnY=
- 答案:QSxE
PGRpdj7lip/njofnm7jnrYnvvIzlgZrlip/ml7bpl7Tnm7jnrYnvvIzliJnlgZrlip/kuZ/nm7jnrYnvvIzlgZrlip/kuYvmr5TkuLoxOjHvvIzpgInpoblB6ZSZ6K+v77yMQuato+ehru+8m+WKn+eOh1A9RnbvvIzml7bpl7Tnm7jnrYnvvIzot6/nqIvkuYvmr5TlpJbkuLoyOjHvvIzliJnpgJ/luqbkuYvmr5TkuLoyOjHvvIzlip/njofnm7jlkIzvvIzlj6/nn6XmiYDlj5fnibXlvJXlipvkuYvmr5TkuLoxOjLvvIzpgInpoblD5q2j56Gu77yMROmUmeivrzwvZGl2Pg==