All Mechanics DOUBTS HERE!!!

[Darkstar3000]

Think about it intuitively. If one ball has a bigger mass and is moving at a faster speed than the smaller one, even though in the opposite direction, which direction will they go in? In the direction of the velocity of the ball with the bigger mass. So both will move in the same direction.

I can see how that would work but what if B had a larger mass ? Which direction would they go in ?

[wakemeup]

I can see how that would work but what if B had a larger mass ? Which direction would they go in ?

Then we can't know for sure. In that case you can either consider both the final velocities in the same or opposite directions. As long as you take care with the +ve and -ve signs you should be able to get the correct answer either way. If you don't know which directions the balls will go in, I recommend considering them both in the same direction as it will make your calculations less messy.

But usually, you will be able to guess the directions of the final velocities intuitively or the question itself will say whether they're going in the same or opposing directions.

[Darkstar3000]

Then we can't know for sure. In that case you can either consider both the final velocities in the same or opposite directions. As long as you take care with the +ve and -ve signs you should be able to get the correct answer either way. If you don't know which directions the balls will go in, I recommend considering them both in the same direction as it will make your calculations less messy.

But usually, you will be able to guess the directions of the final velocities intuitively or the question itself will say whether they're going in the same or opposing directions.

Thank you for your help, I hope intuition works out

[curiousguy]

Please help me with these 2 sums

[astarmathsandphysics]

here

[curiousguy]

PLs solve these from cambridge pastpaper
04/0/n/01 - 2(ii) and 4(i)
04/m/j/02- 5(ii)
04/m/j/03- 4

And can any one upload the solution bank book for m1 edexcel

[astarmathsandphysics]

will have to do these tonight

[astarmathsandphysics]

those m1 questions answered

[The Golden Girl =D]

Okay Here is what our lesson looks like :

Click HERE to view the Mentally corrupted Chapter =,=

I'm SO LOST in this subject even though I'm a Physics Student (this is my SECOND Week of School too T_T ). I guess the fact that Trignometry takes part is making me go ALL Crazy , this isn't Physics this is just A bunch of weird equations combined together => That's how I see it right now 

I need some good demonstrations or some videos or notes that explains this chapter in a Beautiful and easy way i.e. make it user friendly to seriously confused students.

I need it before the Weekend  , god Knows if my teacher will give us a Drop Quiz next week 

Thanks in Advance =]

[astarmathsandphysics]

I have found a way to teach this which I use all the time now.
Have separate columns for suvat - a vertical suvat and a horizontal suvat.

vertically                           horizontally
s =y                                   s=x
u_y=u sin alpha                   u_x=u cos alpha
v                                        v=u cos alpha since there are no horizontal forces so horizontal s[peed is constant and a=0                   
a=-9.8                                 a=0
t                                         t is the same vertivcally and horizontally

Typically you find t by using suvat vertically then put into the suvat equations horizontally to find the range etc.

[The Golden Girl =D]

Can you give me an Example or perhaps any random Question from the Practice/exercise  so that I FULLY understand what you meant =]

[astarmathsandphysics]

ok. Will try to do it in the next half hour.

[astarmathsandphysics]

Questions 3 and 4 from exercises 1A in the attachment.

[The Golden Girl =D]

I got what you meant but I also have another Question now there is an Equation of Parabola that has tan x in it and stuff, I don't know how to use equations having tan x and anything related to Trigonometry. How do I approach such Questions ?

Thanks =]

[astarmathsandphysics]

You will be given x in the question. It is the angle the initial velocity makes with the horizontal. Put it into the equation along with any value of x to find values for y.
MAKE SURE YOUR CALCULATOR IS IN DEGREES MODE!