课程名称︰普通物理甲上 课程性质︰必修 课程教师︰苏德润 开课学院：工学院 开课系所︰化工系 考试日期（年月日）︰ 考试时限（分钟）：110分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1. in figure 8-27,a single frictionless roller-coaster car of mass m= 825kg top s the first hill with speed v0=20.0 m/s,at height h=50.0m. how much work does the gravitational force do on the car from that point to (a) pointA (b)point B (c)point C? if the gravitational potential energy of the car-Earth system is taken to be zero at C,what is its value when the car is at (d) B and (e)A? (f) if mass m were doubled, would the change in the gravitational potential energy of the system between points A and B increase,decrease,or remain the same? (20%) can we ship the car at A,B,C? what kinds of equilibria at B,C? (5%) 附图 http://ppt.cc/tksW 2.a smooth block of mass mt=4.0 kg is put on top of a block of mass mb=5.0kg. to cause the top block to slip on the bottom one while the bottom one is held fixed, a horizontal force of at least 12N must be applied to the top block. the assembly of blocks is now placed on a horizontal frictionless table(Fig6-47) find the magnitudes of (a) the maximum horiontal force F that can be applied to the lower block so that the blocks will move together and (b) the resulting acceleration of the blocks 附图 http://ppt.cc/Ysdv 3.at what initial speeds must the basketball player in Fig4-50 throw the ball, at angleθ0=55' above the horizontal, to make the foul shot?the horizontal distances are d1=1.0ft and d2=14ft,and the heights are h1=7.0ft and h2= 10 ft (g=10m/s^2=33ft/s^2) 附图http://ppt.cc/l8pR 4.in Fig 4-14,a resuce plane flies at 198km/h(=55.0m/s) and constant height h= 500m toward a point directly over a victim, where a rescue capsule is to land (a)what should be the angle ψ of the pilot's line of sight to the victim when the capsule release is made? (b)as the capsule reaches the water, what is its velocity v in unit-vector notation and in magnitude-angle notation? 附图 http://ppt.cc/qkb1 -- I am Captain America~~~~ --

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