海南省海南中学学年高一物理上学期期末考试试题.doc

海南省海南中学2013-2014学年高一物理上学期期末考试试题 （21班）（无答案）新人教版 （21班用） 第Ⅰ卷（选择题，请在答题卡上填涂选项） 一、选择题（本题共10小题；每小题5分，共50分） 1．When a force F moves its point of application through a displacement s in the direction of the force,the work W done by the force is given by W=Fs How many vector quantities and scalar quantities does this equation contain? A．one scalar quantities and two vector quantities B．one vector quantities and two scalar quantities C．three scalar quantities D．three vector quantities 2．What is a reasonable estimate of the average kinetic energy of an athlete during a 100m race that takes 10s? A．40J B．400J C．4000J D．40 000J 3．In an experiment to determine the acceleration of free fall using a falling body.what would lead to a value that is too large? A．air resistance B．dimensions of the body are too large C．measured distance longer than true distance D．measured time longer than true time 4．In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The stone reaches point Q just before landing. The vertical component of acceleration of the stone is A.zero at T B.larger at T than at Q C.larger at Q than at T D.the same at Q as at T 5．A concrete cube of side 0.60m and uniform density 2.0×103kg m-3 is lifted 5.0m vertically by a crane. What is the change in potential energy of the cube? A．2.2kJ B．21kJ C．59kJ D．450kJ 6．The force resisting the motion of a car is taken as being proportional to the square of the car’s speed. The magnitude of the force at a speed of 20m s-1 is 800N. What effective power is required from the car’s engine to maintain a steady of 40m s-1? A.32kW B. 64kW C. 128kW D. 512kW 7．A car of mass m travels at constant speed up a slope at angleθto the horizontal,as shown in the diagram.Air resistance and friction provide a resistive force F. What force is needed to propel the car at this constant speed? A.mgco