如图所示,在升降机中,质量为m的木块放在倾角为θ、质量为M的斜面上,木块与斜面保

题型:计算题

问题:

如图所示,在升降机中,质量为m的木块放在倾角为θ、质量为M的斜面上,木块与斜面保持相对静止,分别求以下两种情况中,木块所受到的支持力FN和摩擦力Ff、斜面体对升降机底板的压力F'。

(1)当升降机以速度v匀速上升时;

(2)当升降机以加速度a匀减速上升时。

考点:共点力的平衡失重
题型:计算题

You are working as a project manager for a major US-based public company.This morning you received alarming news that the major strategic project you are responsible for will not be able to provide financial benefits to the organization as expected.This drawback will significantly influence future profits of the entire corporation.What should you do right now ?()

A.You should not overact and check at least three options before making any decision

B.You must immediately inform the corporate management to ensure real time issuers disclosure

C.You should investigate detailed information on the problem before escalating it to corporate managemen

D.You should find a quick solution for the problem and implement this immediatel

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签订服务合同应注意事项中,哪一项是错误的?()

A.明确业主委员会权利义务

B.明确物业管理企业权力和义务

C.主要条款宜粗不宜细

D.对违反责任的约定

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琴曲《酒狂》的作者是()。

A.阮籍

B.嵇康

C.郭丐

D.蔡邑

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