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）︰2008/10/29
考試時限（分鐘）：50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 300g block is dropped onto a relaxed vertical spring that has a spring
constant of k=50.0N/cm.The block becomes attached to the spring and
compresses the spring 20 cm before momentarily stopping.While the spring is
being compressed,what work is done on the block by (a) the gravitational
force on it and (b) the spring force?
(c)What is the speed of the block just before it hits the spring?
(Assume that friction is negligible)
(d)If the sprrd at impact is doubled,what is the maximum compression of the
spring?
2.A 80kg skier starts from rest at height H=30m above the end of a ski-jump
ramp and leaves the ramp is frictionless.
(a)What is the maximum height h of his jump above the end of the ramp?
(b)If he increased his weight by putting on a backpack,would h then be
greater,less,or the same?
3.Consider a rocket that is in deep space and at rest relative to an inertial
reference frame.The rocket's engine is to be fired for a certain interval.
What must be the rocket's mass ratio (ratio of initial to final mass) over
that interval if the rocket's final speed relative to the inertial frame
is to be 1.5 times the exhaust speed (speed of the exhaust products relative
to the rocket).
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※ 編輯: NBASCIDM 來自: 140.112.183.51 (10/29 13:37)
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