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## #1 2011-08-16 19:56:12

model
Member
Registered: 2011-08-10
Posts: 142

### Displacement and Velocity

Hi all,

Say my finger location is x1 = 236 , y1 = 105 , x2 = 126, y2 =123 .

where
x1.y1 ==> current location and
x2,y2==> previous location

And i have distance computed using
dis = sqrt( (x2-x1)^2 - (y2-y1)^2 )
say angle is 60 degree .

Now, How far my finger move w.r.t its angle and what is its spead at given time 1sec ???? ?

Maths is Doctor that make our life easy ..

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## #2 2011-08-16 20:33:06

bob bundy
Registered: 2010-06-20
Posts: 8,322

### Re: Displacement and Velocity

hi model,

I've made a diagram from what you have posted.  see below.

It is NOT accurately to scale.  But I have calculated the angles accurately using those co-ordinates.

No 60 degrees.  Where does that come from?

And where does 1 sec come from?  Is this the time taken to move from the previous location to the current location?

I'm not sure what you want help with.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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