M2 Help! (Simple question)

If a particle of mass 0.1kg is moving with linear momentum of magnitude 0.108 n/s

why is its speed 1.08? (0.108/0.1)

Please help, I dont understand and why that is

Scroll to see replies

Reply 1

lizard54142

Original post by Kaiden

If a particle of mass 0.1kg is moving with linear momentum of magnitude 0.108 n/s

why is its speed 1.08? (0.108/0.1)

Please help, I dont understand and why that is

Momentum = mass * velocity
Velocity = momentum / mass

Reply 2

Kaiden

Original post by lizard54142

Momentum = mass * velocity
Velocity = momentum / mass

Is momentum not Mv-Mu
0.108= 0.1*v - 0.1u
1.08 = v-u

or am I being incredibly stupid here

nope thats impulse. You wouldn't believe I've got an 2 exam tomorrow.

(edited 8 years ago)

Reply 3

lizard54142

Original post by Kaiden

Is momentum not Mv-Mu
0.108= 0.1*v - 0.1u
1.08 = v-u

or am I being incredibly stupid here

You're getting confused with impulse:

Impulse = change in momentum = mv - mu

mv and mu are both momentum terms

Reply 4

lizard54142

Original post by Kaiden

Is momentum not Mv-Mu
0.108= 0.1*v - 0.1u
1.08 = v-u

or am I being incredibly stupid here

nope thats impulse. You wouldn't believe I've got an 2 exam tomorrow.

I've got the same M2 exam! This is MEI right? The question rings a bell, isn't it a nail?

Reply 5

Jai Sandhu

Original post by Kaiden

Is momentum not Mv-Mu
0.108= 0.1*v - 0.1u
1.08 = v-u

or am I being incredibly stupid here

nope thats impulse. You wouldn't believe I've got an 2 exam tomorrow.

Good luck with your exam, I am doing the non-MEI one (the better of the 2 OCR options).

Reply 6

Kaiden

Original post by lizard54142

I've got the same M2 exam! This is MEI right? The question rings a bell, isn't it a nail?

Yeah it is! Ridiculous question! I Think I've just overwhelmed myself with m2.

Reply 7

Kaiden

Original post by Jai Sandhu

Good luck with your exam, I am doing the non-MEI one (the better of the 2 OCR options).

Thanks, I think? And better in which way? I believe the mei option is more respected among uni's, with it being the harder option.

Reply 8

Jai Sandhu

Original post by Kaiden

Thanks, I think? And better in which way? I believe the mei option is more respected among uni's, with it being the harder option.

Oh yeah it is the harder option, thats why mine is better rofl :colondollar:

But from a uni standpoint It doesnt matter.

Reply 9

lizard54142

Original post by Jai Sandhu

Oh yeah it is the harder option, thats why mine is better rofl :colondollar:

But from a uni standpoint It doesnt matter.

MEI FP3 is ridiculous, multi-variable calculus and groups! It's interesting though.

Reply 10

Jai Sandhu

Original post by lizard54142

MEI FP3 is ridiculous, multi-variable calculus and groups! It's interesting though.

We do groups, we just dont do partial derivatives. You can check it out here

Reply 11

Muttley79

Original post by Kaiden

Thanks, I think? And better in which way? I believe the mei option is more respected among uni's, with it being the harder option.

Not true - MEI C1 is easier than Edexcel ...

All A levels are equally regarded by unis.

Reply 12

lizard54142

Original post by Jai Sandhu

We do groups, we just dont do partial derivatives. You can check it out here

Oh you do! Do you have to do every question in FP3, or do you get to choose?

Reply 13

Jai Sandhu

Original post by lizard54142

Oh you do! Do you have to do every question in FP3, or do you get to choose?

Everything.

Reply 14

lizard54142

Original post by Jai Sandhu

Everything.

Ah, we get to pick 3 from 5; 1 on each topic.

Reply 15

Jai Sandhu

Original post by lizard54142

Ah, we get to pick 3 from 5; 1 on each topic.

Ah so many ours is harder :colondollar:

Reply 16

lizard54142

Original post by Jai Sandhu

Ah so many ours is harder :colondollar:

Possibly, because you have to know everything! I've only learnt 3 topics, so if I get an absolute killer calculus question I have no back-up :s-smilie:

Reply 17

Jai Sandhu

Original post by lizard54142

Possibly, because you have to know everything! I've only learnt 3 topics, so if I get an absolute killer calculus question I have no back-up :s-smilie:

The one thing I can do is integrate. Every STEP paper I do all the integral questions, my performance is directly proportional to the number of integral questions in a paper.

Reply 18

lizard54142

Original post by Jai Sandhu

The one thing I can do is integrate. Every STEP paper I do all the integral questions, my performance is directly proportional to the number of integral questions in a paper.