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  1. Answer : E 任何物件於地球表面,都受到gravitational force (g) ge 影響。Gravitation force會向住地心 (earth core) 拉住件物件。 而你亦都應該學左 Gravitation force = mg 所有物件都有一個Gravitation force (mg) 向下拉 如果該物件係置於地面上...

  2. Time needed for reaching the MAXIMUM velocity : u=0, v=10ms^-1, a=3.3ms^-2, By v=u+at,10=0+3.3t t=10/3.3 s distance of the runner's velocity change from 0 to 10ms^-1 : By v^2-u^2=2aS, 10^2-0=2(3.3)S S=100/6...

  3. shm 的 equilibrium position (e)係唔係第於個amplitude? equilibrium position 是當這個系統還未有受到任何合外力...但是其dx/dt (v)會是最大的.因為所有的位能(pe)會在當物體通這一點equilibrium position 時全部變成動能(ke),但是加速度d2x/dt2會和dx/dt (v)的方向相反即d2x/dt2 +ve時...

  4. friction compensated = 冇 friction 呢個net force. 因為如果你係平面推架車仔, 佢會有個friction 阻住你, 令你冇咁易推(net force 小左). or 你推完個friction 會整停佢. 但個斜路 佢係有個force 向下, 係mgsinx 咁當佢呢個mgsinx 同個木版gei friction 一樣, 咁佢就冇net force , 咁就好似冇左 令佢減速gei...

  5. A car travels from town A to town B. It first moves at a speed of 60km/h for 20 minutes and then at 80km/h for the rest of time. What is the car’s average speed if the distance between town A and town B is 60km...

  6. 你不可以這樣計,因為你無法得知個Ball是在何時何地開始Fall freely from rest,也無法得知個Ball在Point A的速度 但你在Sub數時,已假設個Ball是在Point A fall freely from rest,也就是事先假設個Ball在...

  7. Yes, the title of Executive is usually more senior than that of Administrator. I assume you are referring to an office in the private sector. An Executive is empowered to act (or execute) on behalf of the...

  8. A man standing in a stationary lift releases a stone. The stone takes t seconds to reach the floor of the lift. If the lift is moving downwards with constant velocity instead of being stationary A.The stone...

  9. ER = Engineer Representative 即是工程師代表 RE = Resident Engineer 即是地盤工程師 通常政府先有ER. 而ER是座Office做admin(e.g. V.O., Payment) 嘢, 又會落地盤開會.

    分類:科學及數學 > 工程學 2007年01月19日

  10. Equities refer to stocks investment. In Ibank they may divide up by region or by industry ( e.g. emerging market , japan, korea etc. or by industry group: energy group, restaurant , technology ...) Fixed Income refer to securities that yield fixed return...