All Mechanics DOUBTS HERE!!!

[Saladin]

2007 january paper question 7 last part

and thanks

I am quite sure its Edexcel.




We need to find out the final velocity that the particle reaches after the other particle has fallen.




Now we need to find the time it takes for it to stop, as the resultant force is not towards going down. Thus we have to find the acceleration.





Using this, calculate the time taken for the particle to come to rest.








The time taken to go up, is the time taken to go down, as there is same acceleration.
Thus the total time taken is
Thus the total time taken is 0.51 seconds,

[Uchia]

lol yeah thnxs i used to solve it in the same way but the last step i am always confused about cz some old questions you didn't need to multiply by 2 but this question here required to do so y??

[Saladin]

lol yeah thnxs i used to solve it in the same way but the last step i am always confused about cz some old questions you didn't need to multiply by 2 but this question here required to do so y??

Because it said that how long it takes for it to be taught again. That means up and down.

[Phosu]

jun 02 ques 4a
i just straight off rote R=6gCos30+PSin30
but marking scheme has some other calculations, can someone plz explain how to get that.

[nid404]

must be edexcel...i don't have the paper

[astarmathsandphysics]

They resolved vertically. The answer is a the same

[melony]

help please, how do u determine the direction of the resultant of three coplanar forces. i.e mechanics paper 04/m/j/05
 
thank yu! 

[nid404]

I assume it's the second question

check the diagram

A=7+3.2=10.2
B=3.83N
C=5.2N
D= 3N

Resolving these

A-C=5N
B-D=0.83N

Now find the resultant

R²=

R=5.09N

tan = 0.83/5
=9.43^o anticlockwise from force of 7N

[melony]

wow!! ofcourse!! thanks soo much nid!!.. +rp!
 

[Fenomenoe9]

Can any1 help in this question... please.

Its in June 2008 M1 paper question 5.

Two forces P and Q act on a particle at a point O. The force P has magnitude 15 N and
the force Q has magnitude X newtons. The angle between P and Q is 150°, as shown in
Figure 1. The resultant of P and Q is R.

Given that the angle between R and Q is 50°, find
(a) the magnitude of R,   (4)
(b) the value of X.    (5)

the diagram is something like this its in the question :

                     P
                        \
                         \  
                          \
                           \
                            \._________________ Q
                          O
angles is 150 ^^

[astarmathsandphysics]

here

[Fenomenoe9]

wow m8 thanks soo much!!! and good luck with ur website

[wakemeup]

http://www.xtremepapers.net/Edexcel/Mathematics/2010%20January/21b_M1_January_2010.pdf

Q7(d)

[astarmathsandphysics]

See this

http://astarmathsandphysics.com/a_level_maths_notes/M1/a_level_maths_notes_m1_least_distance_between_two_moving_points.html

[melony]

Can any1 help in this question... please.

Its in June 2008 M1 paper question 5.

Two forces P and Q act on a particle at a point O. The force P has magnitude 15 N and
the force Q has magnitude X newtons. The angle between P and Q is 150°, as shown in
Figure 1. The resultant of P and Q is R.

Given that the angle between R and Q is 50°, find
(a) the magnitude of R,   (4)
(b) the value of X.    (5)

the diagram is something like this its in the question :

                     P
                        \
                         \ 
                          \
                           \
                            \._________________ Q
                          O
angles is 150 ^^

Hey! i knw astars alredy dunt buh i gav it a shot usin a diff method if it helps..