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  1. (1) Length of each tape represents total displacement of object within a period of time. "... the average velocity (2) I guess it should be the length of the tape instead of the width. As the tape is cut into lengths ...

  2. A ticker tape timer is a device that works by making marks on ticker...carbon paper or an electrical spark as the paper is pulled through the ticker tape timer. The timer makes these marks at regular intervals...

  3. ...to produce 1 dot = 1 / 50 = 0.02s Since there're 5 dots in each tape , the time interval is: 0.02 x 5 = 0.1s Average speed of the trolley...

  4. length 是displacement over that time period, therefore the higher its average velocity , longer length. By average velocity = displacement over that time period. (1)是對的, width 係指打橫既長度, 打直既長度 longer than 打橫既長度. (1) is true, (3)is wrong. Only...

  5. ... Drew 響1926年發明嘅. Adhesive tape 圖片參考:http://upload.wikimedia.org/wikipedia/commons... Drew of 3M. The original tape was a paper-backed masking tape . ...

  6. ...the wire should be straight some P.E will store in the wire. the ticket tape timer paper should be straight it may take the paper dots not seperate well as you...

  7. The motion of the sticky tape is given by, T.cos(theta) + Ff = mR.w^2 where..., R = (L+a).cos(theta), where a is the radius of the sticky tape w = 2.pi/(t/20) = 40.pi/t thus, Mg.cos(theta) + Ff = m.Lcos...

  8. ...to measure the speed of the train throughout the journey. One end of a ticker tape of about 3.5m (>3m) is first stuck to the rear of the train...

  9. 所需儀器: ticker- tape timer,中文好似叫紙帶計時器. 找出推動玩具車的速率變化, 計出加速度(應為負數...

  10. 1. You should know that the tape can only examine halfperiod of the motion. The dots are closely...