課程名稱︰普通物理甲
課程性質︰
課程教師︰黃暉理
開課學院：理學院
開課系所︰生機
考試日期（年月日）︰98/10/21
考試時限（分鐘）：50
是否需發放獎勵金：
（如未明確表示，則不予發放）
試題 :
1.Two snowy peaks are at heights H = 500m and h = 450m above the valley
between them. A ski run extends between the peaks, with a total length of
1.9km and average slope of θ=30度. (a) a skier starts from test at the
top of the higher peak. At what speed will he arrive at the top of the lower
peak if he coasts without using ski pole? Ignore friction. (b) Approximately
what coefficient of kinetic friction between snow and skis would make him
stop just at the top of the lower peak?
2.A 4.0g bullet is fired horizontally at two blocks at rest on a frictionless
table. The bullet passes through block 1 (mass 1.50 kg) and embeds itself in
block 2 (mass 2.0 kg). The blocks end up with speeds v1 = 0.60 m/s and v2 =
1.2 m/s. Neglecting the material removed from the block 1 by the bullet,find
the speed of the bullet as it (a) leaves and (b) enters block 1.
3.A uniform spherical shell of mass M = 4.0 kg and radius R = 8.0 cm can
rotate about a vertical axis on friction less bearings. A massless cord
passes around the equator of the shell,over a pulley of rotational inertia
I = 0.003 kg‧m^2 and radius r = 5.0 cm, and is attached to a small object
of mass m = 1.0 kg. There is no friction on the pulley's axle; the cord does
not slip on the pulley. What is the speed of the object when it has fallen
80 cm after being released from rest? Use energy consideration.
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※ 編輯: dabson 來自: 219.84.77.115 (11/12 00:21)