*MEGATHREAD* - BMAT for 2016 Entry Discussion

Hey guys, how can you answer this question without SUVAT?

A bullet of mass 50g is fired from a rifle with a velocity of 300m/s. It hits a bank of earth and after travelling 60cm into the bank comes to rest.

What is the average stopping force of the earth in the bank on the bullet? 37.5N 3.75 x 103N. 3.75 x 104N 3.75 x 106N

Hey guys, how can you answer this question without SUVAT?

A bullet of mass 50g is fired from a rifle with a velocity of 300m/s. It hits a bank of earth and after travelling 60cm into the bank comes to rest.

What is the average stopping force of the earth in the bank on the bullet?
37.5N 3.75 x 103N. 3.75 x 104N 3.75 x 106N

the bullet is travelling in air with some kinetic energy which we can calculated by 1/2mv^2, i.e. 0.5*0.05*300^2 = 2250J.

When it hits the 'bank of earth' the frictional force or the 'stopping' force has to do work on the bullet to make it stop. There's a handy equation for this, W=Fd.
W = 2250J because we want to get the KE to equal 0.
d= 0.6m

so F=2250/0.6 = 3750 (or 3.75*10^3).

anyway, do suvat equation it's much easier.
v^2 = u^2 + 2as
then you just put in the values to get a.
Then you use F=ma to get the stopping force.

S= 0.6mU= 300m/sV= 0m/sA= ?T= ?We know that F=MA, we know Mass and want Force so we need to find Acceleration.Use V^2 = U^2 + 2AS0^2 = 300^2 + 2*0.6*A0 = 90,000 + 1.2A1.2A = - 90,000A = 75,000 (Sign is irrelevant as we just want magnitude not direction)F=MA = (50 * 10^-3) * 75,000 = 3750 = 3.75*10^3So answer is: B

Hi,
How would you do this question

Power = energy / time

(gravitation poteintial) energy = mass * gravitation field strength * height
you may have seen this as GPE=mgh

Guys need help again

how is everyone preparing for section 2, ive wrtten down some things from the content guide but the questions are so hard even though ive done all 3 sciences and maths to AS???
like theyre so hard and time consuming but I dont wanna do the past papers until i know im more prepared.

How would this question be solved? I just cant work out the time of it.

For anyone who's still looking for revision materials, I found this book (http://www.amazon.co.uk/Passing-UKCAT-BMAT-Questions-University/dp/1446271226) very helpful when I sat the BMAT last year - it gives you some general tips on each section before giving you practice questions, and was very good especially for Section 3. Check to see if your school/college has it in the library if you can (or maybe even your public library) so you don't have to spend any money if you don't need to

http://www.ucl.ac.uk/lapt/bmat/ was also shown to me by my college - it has a bunch of practice questions similar to those you'd find in Sections 1 and 2. I didn't use it much myself as I wasn't fond of the format but this might help some of you anyway

General things I found about the BMAT last year were that it helps to scribble down things on the question paper for Section 1 if you need to. Also in Section 1 there are a fair few critical thinking type questions where you're given a passage of text and are asked to find the most likely conclusion, reasonable assumptions that can be made based on the text etc. These are usually straightforward though and the UKCAT will have given you some practice if you've done it.
In Section 2 most of the content is GCSE level but some does stray a little into AS - last year it was very maths and physics heavy (my weaknesses haha), so it's worth brushing up on your weak spots if you have them. It is fairly straightforward for the most part though
In Section 3 you'll end up with more time than you need if you have a good question and are a fast writer. An earlier post said spend about half your time planning and half your time writing which seems about right. Make sure you answer all the subquestions in the question and pick about 2 or 3 points from each side of the argument to use in the essay - don't try to use every point you come up with because you'll run out of space. Just keep it concise and well argued and you should be okay
You can use bullet points if you want - we were shown some sample 5A answers that did this.

This ended up way longer than I intended to, but hopefully this will help someone

P=E/t
E = mgh = 5kg*10m/s^2*5m = 250J
As it says that 5kg passes trough every second, t=1s
So, P = 250/1 = 250 W

When the water leaves the nozzle, total change in KE = total change in GPE.
Therefore, 1/2mv^2 = 250
v^2 = 250/2.5
v^2 = 100
v = 10 m/s
So the answer should be G.

so do you would the GCSE science just be core science or does it include additional and further additional science?
thanks!

Thank you
Is the ISC 400 book good? I have it but i'm not sure how similar the questions are to the past papers

How do you turn your marks/percentage into a score like that? I did section 1 of the specimen paper and got 63% but I don't know what that translates as, or even if it's good or not

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