You are Here: Home >< Maths

M1 collision help Watch

1. An explosive charge of mass 150g is designed to split into two parts, one with mass 100g and the other with mass 50g. When the charge is moving at 4m/s it splits and the larger part continues to move in the same direction whilst the smaller part moves in the opposite direction. Given that the speed of the larger part is twice the speed of the smaller part, find the speeds of the two parts.

I'm nomrally quite good at collusion question, however with the particles exploding i do not know how to start off. any help would be much appreciated
2. And there was me thinking there was a pile up on the M1.
3. Give me a few minutes.
4. (Original post by Byrney11)
An explosive charge of mass 150g is designed to split into two parts, one with mass 100g and the other with mass 50g. When the charge is moving at 4m/s it splits and the larger part continues to move in the same direction whilst the smaller part moves in the opposite direction. Given that the speed of the larger part is twice the speed of the smaller part, find the speeds of the two parts.

I'm nomrally quite good at collusion question, however with the particles exploding i do not know how to start off. any help would be much appreciated
Using conservation of momentum :

Initial momentum = final momentum

Hence, 0.15*4 = 0.1*2*v - 0.05v

solving for v we get : v= 4

smaller part's speed = 4

larger part's speed = 8
5. aaaaahh i see what you have done, you put the inital charge as a particle as well. thats made things a lot clearer cheers
6. (Original post by Byrney11)
aaaaahh i see what you have done, you put the inital charge as a particle as well. thats made things a lot clearer cheers
I prefer drawing diagrams.... it makes things easier and if you mess up the actual calculation the examiner knows what you were intending to do so you may get some marks.

7. yeah im doing m1 c1 and c2 in january as i mucked up them quite badly in june
8. (Original post by Huskaris)
And there was me thinking there was a pile up on the M1.
haha me too
9. Just use conservation law of energy for momentums: m1u1+m2u2=m1v1+m2v2
remembering to work in kilograms and changing direction means the velocity becomes negative

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: December 15, 2010
Today on TSR

Oxford interview invitations

When can you expect yours?

Official Cambridge interview invite list

Discussions on TSR

• Latest
• See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants

Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.