課程名稱︰普通物理甲上 課程性質︰大一共同必修 課程教師︰黃暉理 開課學院：生農學院 開課系所︰生物產業機電工程學系 考試日期（年月日）︰2008/10/08 考試時限（分鐘）：60分鐘 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 1.A baseball leaves a pitcher's hand horizontally at the speed of 150 km/hr, the distance to the batter is 18.3m. The batter hits the ball into a fly, the initial speed of the ball is 30m/s directed at angle θ＝45度 above the horizontal. The ball falls to the ground 93.3m far from the batter. (a)how long does the ball take to travel from the pitcher to the batter? (b)the maximum height H of the ball above the ground? (c)at what height h1 does the batter hit the ball? (d)at what height h2 does the ball leave the pitcher? 2.A 20kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 25kg package on the ground. (a)what is the magnitude of the least acceleration to the monkey must have, if it is to lift the package off the ground? If,after the package has been lifted,the monkey stops its climb,and holds onto the rope,what are the(b)magnitude and(c)direction of the monkey's acceleration,(d)and the tension in the rope. 3.A 10.0kg block is sent sliding up a plane inclined at θ＝39度 while a horizontal force F of magnitude 70N acts on it.The coefficient of kinetic friction between block and plane is 0.40.The block's initial speed is 5.0m/s. (a)what is the magnitude and direction(up or down the plane)of the block's acceleration? (b)how far up the plane does the block go? (c)when it reaches its highest point,does it remain at rest or slide back down the plane? --

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