题目

滑板运动是一项非常刺激的水上运动，研究表明，在进行滑板运动时，水对滑板的作用力Fx??垂直于板面，大小为kv2，其中v为滑板速率（水可视为静止）。其次运动中，在水平牵引力作用下，当滑板的水面的夹角时，滑板做匀速直线运动，相应的k=54kg/m，人和滑板的总质量为108kg，试求（重力加速度g取10m/s=2,，忽略空气阻力）；    （1）水平牵引力的大小；    （2）滑板的速率；信息匹配 (共5小题；每小题2分，满分10分)阅读下列应用文及相关信息，并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。以下是为留英学生编写的系列留学指南的简介：A．The number—one guide to what to study in the UKThis two-volume Guide features up-to-date and in-depth information about UK course options and institutions. It also includes course charts, teaching and research ratings, and advice on choosing your course.B．The A to Z of where to study in the UKA reference directory of UK institutions belonging to the British Council’s Education Counselling Service. Includes easy-to-use comparative data on everything from accommodation to courses and fees.C．The essential online guide to UK educationThis site gives you instant access to a wide range of information on studying and living in the UK, including hotlinks to the British Council’s Virtual Campus and institutions’ own web sites.D．The practical guide to making the most of your UK experienceThis fully updated book features the latest information about study opportunities, traveling to the UK, arranging accommodation, working in the UK, financial and legal matters, and student life. E. New guide to choosing the right UK courseEvery year, The Times newspaper compiles a league table of all the UK's ninety-seven universities. This is published as The Good University Guide, which features over fifty tables ranking universities by degree subject. F. The magazine that shows why so many international students choose to study in the UKIf you’ve enjoyed reading this magazine and want to keep up with the latest UK student news and views, place your order now for issues 3 and 4. 以下是留英指南图书或杂志的封面，请匹配封面与其对应的简介：