課程名稱︰普通物理甲上
課程性質︰必修
課程教師︰蘇德潤
開課學院：工學院
開課系所︰化工系
考試日期（年月日）︰
考試時限（分鐘）：110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. 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%)
附圖 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
附圖 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)
附圖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?
附圖 http://ppt.cc/qkb1
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