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M1 Exam Question help

Hi I'm really struggling on part d...

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Any help?
Many thanks!
Reply 1
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Zacken
22
Original post by pygmypossum
Hi I'm really struggling on part d...



Any help?
Many thanks!


What have you tried?
Reply 2
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pygmypossum
OP
Original post by Zacken
What have you tried?


Well I know that the maximum speed is at 0.5 meters. So I tried using a V=u +at
With:
V=?
U-8sin30
A=-9.8
T=0.964
Reply 3
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Zacken
22
Original post by pygmypossum
Well I know that the maximum speed is at 0.5 meters. So I tried using a V=u +at
With:
V=?
U-8sin30
A=-9.8
T=0.964


Why don't you use v^2 = u^2 + 2as? Also, whilst h is 0.5, s the displacement from 1.2 m is not 0.5 :smile:
(edited 8 years ago)
Reply 4
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pygmypossum
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Original post by Zacken
Why don't you use v^2 = u^2 + 2as? Also, whilst h is 0.5, s the displacement from 1.2 m is not 0.5 :smile:


So:

v^2=(8sin30)^2+2*-9.8*-0.5???
Reply 5
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Zacken
22
Original post by pygmypossum
So:

v^2=(8sin30)^2+2*-9.8*-0.5???


s is not 0.5. Do you know what displacement means? What's your displacement if you move from 1.2 above the ground to 0.5 above the ground? How many metres have you displaced?
Reply 6
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pygmypossum
OP
Original post by Zacken
s is not 0.5. Do you know what displacement means? What's your displacement if you move from 1.2 above the ground to 0.5 above the ground? How many metres have you displaced?


It is the distance you have traveled from the start point? Is it 0.7?
Reply 7
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Zacken
22
Original post by pygmypossum
It is the distance you have traveled from the start point? Is it 0.7?


It's -0.7.
Reply 8
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pygmypossum
OP
Original post by Zacken
It's -0.7.


Sorry yes,
So I am doing v^2=(8sin(30))^2+2*-9.8*-0.7
v= 5.45??
Reply 9
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Zacken
22
Original post by pygmypossum
Sorry yes,
So I am doing v^2=(8sin(30))^2+2*-9.8*-0.7
v= 5.45??


Sounds about right.
Original post by Zacken
Sounds about right.


Thank you :smile:
Reply 11
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Zacken
22
Original post by orange8120
Thank you :smile:


I'm confused, you're not OP? :lol:
this is M2
Reply 13
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Zacken
22
Original post by rigamortis345
this is M2


Does it matter?
Original post by Zacken
Does it matter?


Yes, because if he is practising for M1 then he should be doing M1 questions, he does not need to do the question.
Reply 15
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Zacken
22
Original post by rigamortis345
Yes, because if he is practising for M1 then he should be doing M1 questions, he does not need to do the question.


It's probably just a typo in the title? How d'you know it's M2, by the way?
Original post by Zacken
It's probably just a typo in the title? How d'you know it's M2, by the way?


I have an exam on M2 in two months.
in M1 you only have to work out kinematics for one component, either horizontal or vertical, but in M2 its two components for the majority of questions, it does this by giving a particle an angle of elevation.
Reply 17
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Zacken
22
Original post by rigamortis345
I have an exam on M2 in two months.
in M1 you only have to work out kinematics for one component, either horizontal or vertical, but in M2 its two components for the majority of questions, it does this by giving a particle an angle of elevation.


Uhm, there are different exam boards...

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