Check carefully whether a graph is a speed-time graph or a distance-time graph. On true speed–time graphs, the speed has only positive values. On velocity–time graphs the velocity can be negative. Image Tachographs are instruments that are put in lorry cabs to check that the lorry h...
2. The driver will take some time to react. A reasonable estimate of human reaction time is: A. 0.03 s B. 0.3 s C. 1 s D. 2 s ABCD 3. Which of these correctly states the formula for working out the distance travelled before stopping? A. Total stopping distance = thinking distanc...
Distance- and speed-time graphs Standard measures (i.e. unit conversions) Proportion graphs Reverse percentages Simple and compound interest What should you be teaching this year? Speed, distance and time featured more heavily than other compound units work, such as pressure or density, and most ...
2.Anna lifts her school bag 2m up in the air with a force of 10N. How many times did she do it? 3.Mathew does 200J worth of work whilst pushing a box with the force of 50N. What distance did he move the box? 4.Cai lifts his cat 1.5m into the air. If he had done 75J w...
1.General Physics普通物理 1.1 Length and time长度和时间 1.Use and describe the use of rules and measuring cylinders to determine a length or a volume.使用并且描述如何用尺子和量筒测量长度和体积。 2.Use and describe the use of clocks and devices for measuring an interval of time. ...
1.General Physics普通物理 1.1 Length and time长度和时间 1.Use and describe the use of rules and measuring cylinders to determine a length or a volume.使用并且描述如何用尺子和量筒测量长度和体积。 2.Use and describe the use of clocks and devices for measuring an interval of time. ...