Edexcel IAL Maths - Mechanics 1 - WME01 25 Jan 2016

Honestly, I would say that it is a really annoying paper, but maybe thats just because I am pretty bad at practical stuff.Good luck anyways.

I agree wholeheartedly and share your sentiments. I'm not expecting a good grade tomorrow.

I agree wholeheartedly and share your sentiments. I'm not expecting a good grade tomorrow.

I guess we will have to hope that other candidates score low so that the boundaries are get for us lol.

Guys i also made simple mistakes! i couldn't get the range of the moment and by chance my value for Q.2 came 73/10u due west! i dont know why this value is wrong, as i did the question with utter care! just bad luck it is

Guys i also made simple mistakes! i couldn't get the range of the moment and by chance my value for Q.2 came 73/10u due west! i dont know why this value is wrong, as i did the question with utter care! just bad luck it is

Can you please describe how you got this answer because I am really curious to how the direction could be due west.Moreover,what was your value for Q2)a ??

I=33/5 mu, m=2m, u=4u

=> I=mv-mu
=> 33/5mu=2mv-(2 x 4u)
=> 33/5mu=2mv-8mu
=> 33/5mu + 8mu = 2mv
=> 73/5u = 2v
=> 73/10u = v
v = 73/10u

This is what i did! i hope i did correctly or is it wrong then plz correct! :/ confused

I=33/5 mu, m=2m, u=4u

=> I=mv-mu
=> 33/5mu=2mv-(2 x 4u)
=> 33/5mu=2mv-8mu
=> 33/5mu + 8mu = 2mv
=> 73/5u = 2v
=> 73/10u = v
v = 73/10u

This is what i did! i hope i did correctly or is it wrong then plz correct! :/ confused

Thing is, the magnitude of the impulse is 33/5 mu, you need to work out the direction yourself.

hey guys for the speed time graph of the rock projection , is the graph a straight line starting from a speed of 11 to a -14 ??

Before telling you how many marks you are going to lose, I'm afraid one of us have read the question wrong. I was fairly sure the question had said the mass of the block is $8$ kg and not $5$ kg. I can only ask the others to confirm:


By the way, Omar - what did you get for Q2?

Fewer questions than usual, so more marks per question, more structure than usual. There wasn't the easy speed-time things with distance between two places, etc... but the paper was fairly standard, no thinking required. There'll be high boundaries.

1. (a) F = 2,200 N
(b) M = 800.
(c) Same acceleration for system/trailer as truck.

2. (a) 7u/10 due east
(b) 6u/5 due east.

3. $\displaystyle T = \frac{16g}{5\sqrt{3} + 1}$

4. (a) $h_max = 10$
(b) $\displaystyle t_{\text{total}} = \frac{28}{g} \approx 2.86$

5. (a) (i) $T_A = 94 - 10x$
(ii) $T_B = 66 + 10x$
(b) $1 \leq x \leq 1.8$

6. (a) $\sqrt{68} = 2\sqrt{17} \approx 8.25$
(b) (5+2t)i + (5t-3)j
(c) (7-3t)i + (5-15t)j
(d) t = 2/5 so time 2:24 PM
(e) 29/5i - j

7 (a) T - g/2 = 2a
(b) 3g - T = 5a
(c) (i) a = 5g/14
(ii) T = 17g/14
(d) d= 17/14 (by letting g=1 in c(ii)).

Hey I got the same answers as you!

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A straight line start from 11.2 to -14 and cross the time-axis at (14/g, 0) or (1.43, 0).

Everything exactly the same? If so, congratulations!

I started the line from 7.sth because I thought they asked from the instant when it passes A

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