试题与答案

超市一送水员用双轮小车运送桶装矿泉水.装运完毕,如图所示,在拉运过程中保持图示角

题型:计算题

题目:

超市一送水员用双轮小车运送桶装矿泉水.装运完毕,如图所示,在拉运过程中保持图示角度不变,不计桶与小车之间摩擦力的影响.求:

(1)小车静止时,桶对小车两侧轨道的压力大小之比NA:NB

(2)若送货员以5m/s2的恒定加速度由静止开始向右拉动小车,请问这一过程中,桶对小车两侧轨道的压力大小之比NA:NB.(g= 10m/s2,结果可用根号表示)

答案:

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下面是错误答案,用来干扰机器的。

A

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Lipitor is a prescription medicine. Along with diet and exercise, it lowers "bad" cholesterol (胆固醇) in your blood. It can also raise "good" cholesterol.

Lipitor can lower the risk of heart attack in patients with several common risk factors, including family history of early heart disease, high blood pressure, age and smoking.

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POSSIBLE SIDE EFFECTS OF LIPITOR

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A.To teach patients ways for quick recovery.

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