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92science_physics - 100 2 1 A nanosecond is a 109s b 103s...

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銘傳大學九十二學年度管理研究所碩士班招生考試 ( 甲組 ) 第一節 普通物理學 試題 單選題 100% ( 每題 2 ) 可使用計算機 1. A nanosecond is a) 10 9 s b) 10 3 s c)10 6 s d)10 -9 s e)10 -6 s 2. A ball rolls up a slope. At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0 cm/s. What is the acerage acceleration (in cm/s2) from the third to the eighth second? a) 2.5 b) 4.0 c) 5.0 d) 6.0 e) 7.0 3. As a rocket is accelerating vertically upward at 9.8 m/s 2 near the Earth’s surface, it releases a projectile. Immediately after release the acceleration (in m/s2) of the projectile is: a) 9.8 down b) 0 c) 9.8up d) 19.6 up e) none of the above 4. The velocity of a projectile equals its initial velocity added to: a) a constant horizontal velocity b) a constant vertical velocity c) a constantly increasing horizontal velocity d) a constantly increasing downward velocity e) a constant velocity directed at the target. 5. In principle, a force is measured by measuring the ________, when the force is applied to it. a) velocity of the standard kilogram b) speed of the standard kilogram c) velocity of any object d) acceleration of the standard kilogram e)acceleration of any object. 6. A Newton is the force: a) of gravity on a 1kg body b) of gravity on a 1g body c) that gives a 1g body an acceleration of 1 cm/s 2 d) that gives a 1kg body an acceleration of 1 m/s 2 e) that gives a 1g body an acceleration of 9.8 m/s 2 7. A32-N force, parallel to the incline, is required to push a certain crate at constant velocity up a frictionless incline that is 30?above the horizontal. The mass of the crate is: a) 3.3kg b) 3.5kg c) 5.7kg d) 6.5kg e) 160kg 8. A horizontal force of 12 N pushes a 0.5-kg block against a vertical wall. The block is initially at rest. If m/s=0.6 and m/k=0.8 which of the following is true? a) The frictional force is 4.9N b) The frictional force is 7.2 N c) The normal force is 4.9 N d) The block will start moving and accelerate e) If started moving downward, the block will decelerate
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9. The system shown remains at rest. The force of friction on the upper block is: a) 4N b) 8N c) 12N d) 16N e) 20N w=20N a=3 m b=4 m 10. Which of the following is NOT a correct unit for work ? a)erg b)ft lb c)watt d)newton meter e)joule 11. A 2-kg particle on the end of an ideal spring is pulled out 0.5m and released from rest. The spring constant is 200 N/m. When the particle passes the point where the spring force is zero its speed is a) 0 b) 0.05m/s c) 5 m/s d) 10m/s e) 100m/s 12. A kilowatt hour is a unit of : a) power b)energy/time c) work d) power/time e) force/distance
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