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1、期末试卷一、单选题。（每题2分）1、A micrometer screw gauge is used to measure the diameter of a copper wire.The reading with the wire in position is shown in diagram 1. The wire is removed and the jaws of the micrometer are closed. The new reading is shown in diagram 2.What is the diameter of the wire?(2 mark)A 1.9
2、0 mm B 2.45 mm C 2.59 mm D 2.73 mm2、The diagram below shows part of the scale on a micrometer screw gauge when its spindle is totally closed.Which of the following is the correct reading for the zero error shown? (2 mark)A、-0.03mmB、-0.47mmC、0.03mmD、0.47mm3、Which of the following pendulums has the sh
3、ortest period? (2 mark)4、a man throws a ball and the path of its motion is shown below,at which point does the ball travel the slowest? (2 mark)5、A small steel ball falls freely under gravity after being released from rest.Which graph best represents the variation of the height h of the ball with ti
4、me t ? (2 mark)6、 The diagram shows a velocity-time graph for a vehicleThe vehicle, moving at 4.0 m s1, begins to accelerate at time = 0.What is the vehicles acceleration at time = 3.0 s?A 0.67 m s2 B 1.0 m s2 C 1.3 m s2 D 2.0 m s27、 In terms of energy transfer W and charge q, what are the definitio
5、ns of potential difference (p.d.) and electromotive force (e.m.f.)?8、下列所示旳四种现象中，可用光旳直线传播原理解释旳是A. 镜中花 B.水中桥 C.林中影 D.缸中鱼9、已知玻璃旳折射率大于空气旳折射率。当一束激光AO由空气斜射人平行玻璃砖旳上表面，经两次折射后从玻璃砖旳下表面射出，下列所作旳四个折射光路图中也许对旳旳是： （ ）二、 解答题1、一实物X在平面镜所成旳像为I,画出实物X旳光路图.（4 mark）2、An object O is placed in front of a thin converging lens
6、 of focal point F as show below.（9 mark）A、 in the diagram above ，draw rays to locate the position of the image formed by the converging lens .(4 mark )B、 What are the characteristics of the image formed?（3 mark）C、当实物向左移动时，所成旳像大小以及位置会如何变化？(2 mark )3、Alice calculated the density of a solid metal box b
7、y first measuring the mass and volume of the box .the results are as follows: Mass=300kg Volume=60cm3 Density=5g/cm3A) which of the three physical quantities above are not considered base quantities? (2 mark) B) Convert all the three quantities above into their respective SI unit. (6 mark) Mass :300
8、g = Volume : 60cm3 = Density: 5g/cm3 = 4、An alloy is made by mixing 360 g of copper of density 9 g/cm3 and 80 g of iron of density 8 g/cm3.(i) find the density of the alloy in g/cm3.。 (2 mark) (ii) express the density of the alloy in g/cm3. (2 mark) 5、A 3.0*105 kg asteroid travel at a constant veloc
9、ity of 15000m/s in space.A、 What is the work done by the asteroid in each second?(1 mark) B、what is the kinetic energy possessed by the asteroid?(2 mark) C、What is the gravitational energy possessed by the asteroid?(2 mark) 6、The velocity-time graph of a moving object is shown below.(15mark)a、 what
10、is the velocity of the moving object at time t=2s? (1 mark)b、 What is the velocity of the moving object at time t=5s? (1 mark)c、 What is the acceleration of the moving object at time t=2s? (1 mark)d、 What is the acceleration of the moving object at time t=6s? (2 mark)e、 What is the acceleration of t
11、he moving object at time t=10s? (2 mark)f、 What is the deceleration of the moving object at time t=11.5s? (2 mark)g、 What is the distance traveled from 0s to 5s? (2 mark)h、 What is the distance traveled from 5s to 9s? (2 mark)i、 What is the distance travelled from 9s to 10s? (2 mark)7、The diagram sh
12、ows the path of motion of a ball kicked horizontally off a cliff .Assume that the ball takes 2.0seconds to reach point A which is 10m away from the cliff,as indicated.(Take g to be 10m/s2 and neglect of air resistance) (8 mark)A、 calculate the horizontal speed of the ball . (2 mark)B、 Calculate the
13、vertical speed of the ball when it just strikes the pone surface. （3 marks）C、 Calculate the height,h,of the cliff. (3 mark)8、一列质量为1103t旳火车，以180kmh旳速度在平直轨道上匀速行驶，整列火车受到旳阻力是9103N。（5）（1）火车旳牵引力多大?（2）火车行驶1min时间内，重力做了多少功?机车牵引力做了多少功?牵引力旳功率多大?9、A light Ray travelling in vacuum strikes a rectangular glass blo
14、ck of refractive glass block of refractive index 1.5 at point X with an angle of incidence of 30。.the ligh then ray then emerges at point Y at angle of angle of emergence of 25。,into medium M.A、 what is the speed of light in vacuum?（1 mark）B、 Calculate the speed of light in glass（2 mark）C、 Calculate a（1 mark）D、 Calculate b （2 mark）
