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2007
Wed
15
Aug
Miss Loi avatar

Relative Velocity – Flight JS296

(11)
Tuition given in the topic of A-Maths Tuition Questions from the tuition centre desk of Miss Loi at 12:17 pm (Singapore time)
Singapore Girl

No. She’s not the Head Stewardess
of Flight JS296.

Dear passengers, welcome aboard Jφss Sticks Airways flight JS296 bound for Bangkok. This is your Head Stewardess Miss Loi speaking.

Unfortunately, due to … umm … some wild party in the cockpit last night (damn those pilots!), our Captain has been completely knocked out and has now handed over the reins of this aircraft to yours truly!

But yours truly doesn’t know the way! These are his last instructions before he passed out:

Our flight is scheduled to fly due north from Singapore to Bangkok. Bangkok is 1400 km from Singapore. There is a wind blowing from the bearing 060o at a constant speed of 96 km/h. Given that the speed of the plane in still air is 800 km/h, find

  1. the course that needs to be set by the pilot.
  2. the flight time, to the nearest minute.

On the return journey, the wind will be flowing at the same speed from the bearing 030o and the speed of the plane in still air remains unchanged, find

  1. the course that needs to be set by the pilot.
  2. the flight time, to the nearest minute.

Now please turn to the last page of your Passenger Safety Handbook and look at the para titled Relative Velocity.

*moans of utter dismay from passengers*

Please don’t panic, everyone. Being a full-time tutor (yes just standing-in for the Head Stewardess for this flight), I understand that Relative Velocity is a daunting topic for most of you.

Tales of rivers, ships, planes, flies, spiders, or whatever that moves aside, they can be generally solved using trigonometry or vectors.

But no matter the type, you’ll need to remember this till the end of days:

vp = vp/w + vw

where,
vp = resultant velocity of p
vp/w = velocity of p relative to w (usually described as ‘in still air/water etc.)
vw = velocity of w (usually wind, water etc.)

Now, dear passengers, since we’re short of time (else MBK will be closed by the time we get there!), our chances of shopping in Bangkok today will depend greatly on your trigonometry skills, especially your sin and cosine rules!

Last but not least, check your bearings! Please, please know the difference between various words like to, from, due and of course your North-South-East-West!

So can anyone help poor Miss Loi get everyone safely to Bangkok, and back (knowing the Captain, think he will miss his flight again for extending his Thai massage session – duh!!!)?

Thank you for your kind attention. Miss Loi shall now address our Thai passengers.

Sawadee-kaaaahhhhh!!!! ….

頑張って!!!

Revision Exercise

To show that you have understood what Miss Loi just taught you from the centre, you must:

  1. Leave A Comment!
Comments & Reactions

8 Comments

  1. Janice's Avatar
    Janice commented in tuition class


    2007
    Aug
    15
    Wed
    12:34pm
     
    1

    Nice blog. Love your little humour in the post 🙂

  2. WishBoNe's Avatar
    WishBoNe  commented in tuition class


    2007
    Aug
    15
    Wed
    1:02pm
     
    2

    I forogt how to do velocity. 😛 And the captain is lousy. How can pass out just like that?

  3. Miss Loi's Avatar
    Miss Loi Friend Miss Loi on Facebook @MissLoi commented in tuition class


    2007
    Aug
    15
    Wed
    3:35pm
     
    3

    Janice, thanks for your kind words but this is a grave matter! The Bangkok sale is ending tonight!

  4. Miss Loi's Avatar
    Miss Loi Friend Miss Loi on Facebook @MissLoi commented in tuition class


    2007
    Aug
    15
    Wed
    3:42pm
     
    4

    WishBoNe, maybe the Captain himself is too stressed by this Relative Velocity question!

  5. Becky's Avatar
    Becky commented in tuition class


    2007
    Aug
    16
    Thu
    10:33pm
     
    5

    Honestly I have to say I have no idea about this. But I do love the layout of your blog

  6. Jason Ho's Avatar
    Jason Ho commented in tuition class


    2007
    Aug
    17
    Fri
    12:26am
     
    6

    woah..everyone is going to Thailand..but yeah..it is a lovely place isn't it? enjoy yourself and do get hammered..beer is cheap...oh yeah..drool~

  7. Miss Loi's Avatar
    Miss Loi Friend Miss Loi on Facebook @MissLoi commented in tuition class


    2007
    Aug
    17
    Fri
    2:51pm
     
    7

    Becky, thanks for your flattering words. Your blog theme is neat too.

    But a pity you don't have the solution to the problem. Some passengers are already demanding a refund now!

  8. Miss Loi's Avatar
    Miss Loi Friend Miss Loi on Facebook @MissLoi commented in tuition class


    2007
    Aug
    17
    Fri
    3:02pm
     
    8

    Hello Jason!

    Think you've enjoyed your Thailand trip a great deal. Now have naughty Jason been hammering too many nails at the bar? *sly wink*

3 Reactions

  1. Tweetback
    Miss Loi tweeted


    2007
    Aug
    15
    Wed
    4:28am
     
    9

    Mayday Mayday! Flight JS296 is in trouble! Please help @ http://tinyurl.com/yqcol2

  2. Pingback
    Pinged by missloi


    2007
    Aug
    15
    Wed
    4:28am
     
    10

    Mayday Mayday! Flight JS296 is in trouble! Please help @ http://tinyurl.com/yqcol2

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