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CCEA AS1 Physics (11th June)

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I got 20.1 for the horizontal displacement so close to some here, maybe due to different rounding.
I said increased acceleration for the plane.

Reply 21

pijips

Original post by ehhwot

What? Increase acceleration

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To increase the acceleration, the mass has to be decreased due to F = ma

Reply 22

Frank the Tankk

Original post by pijips

Maybe less fuel? Not sure there is any other practical solution than less people or luggage, in the question before it made a point of mentioning the passengers and their luggage. Their flight would just be delayed

I just wrote increase acceleration hahah...didn't specify how, might be good for a mark. My friends all wrote about removing luggage and therefore decreasing weight and increasing acceleration, the excess luggage can be put on a different plane but I don't think that taking fuel or kicking passengers off the plane works.

Reply 23

Frank the Tankk

Original post by Korra

I got 20.1 for the horizontal displacement so close to some here, maybe due to different rounding.
I said increased acceleration for the plane.

It was 38m. 20 was the range but that wasn't the total distance to the ground, at 20m it was still 2m in the air.

Reply 24

Korra

Original post by Frank the Tankk

It was 38m. 20 was the range but that wasn't the total distance to the ground, at 20m it was still 2m in the air.

Most people I know got in the 20s. Did anyone else get 38?

Reply 25

pijips

Original post by Frank the Tankk

It was 38m. 20 was the range but that wasn't the total distance to the ground, at 20m it was still 2m in the air.

Are you sure? I worked it out by finding the horizontal distance for reaching the maximum height and then the horizontal distance from there to the ground and got 20.4

Reply 26

Jay-dawg

Original post by Frank the Tankk

It was 38m. 20 was the range but that wasn't the total distance to the ground, at 20m it was still 2m in the air.

Original post by pijips

Are you sure? I worked it out by finding the horizontal distance for reaching the maximum height and then the horizontal distance from there to the ground and got 20.4

It was definitely 20.4m to the ground, the total displacement works out to be 20.4 if you add the two for its first portion and its second portion.

Reply 27

Korra

Original post by Jay-dawg

It was definitely 20.4m to the ground, the total displacement works out to be 20.4 if you add the two for its first portion and its second portion.

What was the speed to was projected at? And it was 40 degrees wasn't it?

Reply 28

Frank the Tankk

Original post by Jay-dawg

It was definitely 20.4m to the ground, the total displacement works out to be 20.4 if you add the two for its first portion and its second portion.

Most people I knew got 38.
I used (u^2/g)sin2x to get 20m for the first part of the motion then found the time taken for the shotput to reach the ground (s = -2), at this point the shotput still had constant horizontal velocity so I used that t and the horizontal to calculate the further 18m it traveled. Idk, now that I think about it I could be wrong but I'm not sure :s

(edited 9 years ago)

Reply 29

Jay-dawg

Original post by Korra

What was the speed to was projected at? And it was 40 degrees wasn't it?

13.5 ms^-1 at 40 degrees. :smile:

Reply 30

Frank the Tankk

Yea, I think you're right, it was 20.4...I think I'll still get a few method marks but for calculating t for s = -2 and such.

Reply 31

Korra

Original post by Jay-dawg

13.5 ms^-1 at 40 degrees. :smile:

Just did it and got 20.4

anyone get 116nm for the moments?

Reply 32

HugeBicepLAD

Just did it, it is 20.4 when I was putting it in quadratic I forgot the sin40 silly me

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Reply 33

Jay-dawg

Original post by Korra

Just did it and got 20.4

anyone get 116nm for the moments?

That sounds remotely familiar, but I'm almost sure I got 161Nm, maybe one of us is dyslexic! :wink:

Reply 34

NCONiall

Original post by Jay-dawg

That sounds remotely familiar, but I'm almost sure I got 161Nm, maybe one of us is dyslexic! :wink:

Yeah, I got 161Nm.

Reply 35

Jay-dawg

Original post by Korra

Just did it and got 20.4

anyone get 116nm for the moments?

What was the woman's mass and the angle? :smile:

Reply 36

Frank the Tankk

I got 20.4 but added 18 for it cus I thought you had to add the range (DOH)...silly, and I've been so adamant that it was correct hahaha (possibly because an Oxford candidate in my school made the same mistake as me idk). How many marks would I lose for not declaring it as my final answer? I'm thinking I'll get 3/5 as I had calculated 20.4m using s = -2 and the quadratic formula.