如图质量分别为mA=3kg,mB=1kg的A,B两物体置于粗糙的水平面上,A,B与水平面间的动摩擦因素均为0.25

如图质量分别为mA=3kg,mB=1kg的A,B两物体置于粗糙的水平面上,A,B与水平面间的动摩擦因素均为0.25
（A,B与水平面间的最大静摩擦力可以认为等于滑动摩擦力）.一不可伸长的轻绳将A,B连接,轻绳恰好处于伸直状态,且与水平方向的夹角θ=53°（sin53°=0.8,cos53°=0.6,g=10m/s²）,现以水平向右的力作用于物体A,
（1）若B恰好离开水平面,则B的加速度是多少?此时所施加的水平力F0是多少?
（2）若水平力F=32N,则轻绳的拉力T,水平面对物体B的支持力N是多少?
（3）若A,B从静止开始所施加的水平力F由零缓慢地增加,画出水平面对物体B的摩擦力fB随F的变化图像
图的话就是B在后面小一点,A在前面大一点,B的右上角与A的左上角有绳连接

Xinhua Sana'a June (Xinhua Autumn Melody Yin Ke) Yemeni funds, Sana'a,christian louboutin bridal shoes, the actual Presidential Structure was led through opposition leader Sadiq Ahmar putting the actual tribe militants, killing Leader Ali Abdullah Saleh Yemeni Pm , a Deputy Prime Minister as well as Speaker from the Parliament senior federal government officials as well as senior officials associated with Ten accidental injuries, the number of bodyguards wiped out Saleh.
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A older government official told Xinhua, Saleh head accidental injuries, "the injuries large,christian louboutin platforms, but not as well gentle.Inch \x0d
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Yemen later on day time,christian louboutin high heels, state reported which President Saleh was slightly hurt and has been moved to the location. Subsequently, Saleh , the recording within Yemen speech and resistance leaders condemned apostates Ahmar conspiracy to produce assaults from the presidential structure, as well as it might search for as well as fight the assailants. Saleh's voice sounded weaker. \x0d
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A Yemeni security recognized the artillery covers into the presidential structure mosque. At that time, a few government officials as well as security causes senior officials associated with praise to pray, covers exploded causing senior authorities hurt.
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Yemen judgment celebration spokesperson condemned the tribal militants tried to assassinate your day associated with President Ali Abdullah Saleh. The spokesman : "The shelling of the presidential structure in order to assassinate President Saleh malicious crime." , the spokesperson Ahmar, that has related to the actual putting from the Presidential Palace mosque incident. \x0d
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At the presidential structure had been shelled,christian louboutin sales, the Yemeni government brought through Ahmar tribal stronghold of the chaotic armed assaults.
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, afternoon and evening heard Sana'a, explosions as well as weapons, government soldiers fired heavy armed towards the tribes. Witnesses Ahmar brother's in Sana'a destroyed , to previously announced Yemen joined the actual anti-government camp, Common Ali Mohsen Northwest District's can also be shelling.