IIT JEE , AIEEE Forum - Physics , Mechanics

P90

when a projectile is launched on an inclined plane with inclination beta and initial velocity vector makes an angle of alpha with horizontal is it possible 2 apply R,H,T formula taking the coordinate system along the incline(by making some modifications like taking g as g cos(beta) etc)??? If yes please demonstrate

indzee

Re:Inclined plane projectile

indzee

Dude,

Look at the above diagram:

Here,

1) Time to reach at H = ½ T

2) X1 = X2 = R/2

3) U = V

4) Angle B = Angle @

Now check out the inclined plane diagram below

indzee

Re:Inclined plane projectile

indzee

Now,

Look at the above diagram:

Here,

1) Time to reach at H = ½ T

2) X1 not= X2 not= R/2 (but X1 > X2)

3) U > V

4) Angle B < Angle @

5) Acceleration along X is not constant

indzee

So P90,

Look at the above diagrams and try to prove the T, R & H formulae for inclined plane. You will find

T = 2 U SinB/ g Cos&

H = U² Sin²B/ 2g Cos&

(as you said, ie just replace g)

But, for Range you will get a complicated expression,

R = 2 U² SinB . Cos(B+&) / g Cos²&

Nudge me if you have any query regarding this

indzee

People, somebody has given me a red mark for this answer?. Help what should I dooo????

pannaguma

sorry mate you got boinked for a honest effort. but whoever did it you took your "NOT HERE FOR RATES" line too literally.

indzee

Hey I donno who the new person is !!! and I am sure he must have dont it by mistake!!!

Camon people! if you dont want to salute my efforts, at least dont gimmie a boink!! A boink indicates a bad job and worthless efforts! I m here to help!!! and my efforts are not worthless

rooney

What nonsense is this ? How can anyone get boinked for this. I think the boinks are approved before coming in effect ? How can that reason be approved ?

Indzee...nudge the admin. He should remove your boink. That is just not right.

indzee

@ P90

Dude

To derive the range formula,

Just the thing you do is,

>>Use the second kinematical equation along the x direction on inclined plane,

>>Substitute the value of Time (T) in it?

>>After that take 2U²SinB /g Cos²& common,

>>You remain with Cos& CosB ? Sin& SinB inside the brackets which you can write as Cos(B+&)

>>Therefore you get the final Equation as,

R= 2 U² SinB . Cos(B+&) / g Cos²&

Hope you got it

indzee

Thanks Roony for everything, but how can I contact admn to remove that boink.

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