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# M1 Questions watch

1. (Original post by bono)
We should have ended it after your first post in this thread.
Yes sir.
2. (Original post by mik1a)
Yes sir.
Well, the guy asked about 4 or so questions and imasillynarb replied "use this formula (the only formula he could use, which is in a big box in his textbook). This question is exceesdingly easy, can't you do it?".

Maths isn't "easy". You either get it correct, or not.
Any help, along with workin, would be greatly appreciated.

1. Two small balls A and B have masses 0.5kg and 0.2kg respectively. They are moving towards each other in opposite directions on a smooth horizontal table when they collide directly. Immediately before the collision, the speed of A is 3ms-1 and the speed of B is 2ms-1. The speed of A immediately after the collision is 1.5ms-1. The direction of motion of A is unchanged as a result of the collision.

By modelling the balls as particles, find:

a) The speed of B immediately after the collision.

b) The magnitude of the impulse exerted on B in the collision.

2. A breakdown van of mass 2000kg is towing a car of mass 1200kg along a straight horizontal road. The two vehicles are joined by a tow bar which remains parallel to the road. The van and the car experience constant resistances to motion of magnitudes 800N and 240N respectively. There is a constant driving force acting on thevan of 2320N.

Find:

a) The magnitude of the acceleration of the van and car.

b) The tension in the tow bar.

The two vehicles come to a hill inclined at an angle of x to the horizontal, where sin x=1/20. The driving force and the resistance to motion are unchanged.

c) Find the magnitude of the acceleration of the van and the car as they move up the hill ans state whether their speed increases or decreases.

i had to do exactly the same question 4 2day lollll
4. (Original post by bono)
Well, the guy asked about 4 or so questions and imasillynarb replied "use this formula (the only formula he could use, which is in a big box in his textbook). This question is exceesdingly easy, can't you do it?".

Maths isn't "easy". You either get it correct, or not.
Yes, it was the only formula he could use, and it was simply sticking the numbers into it. Which is why I said it was easy..

Maybe if people would *explain* what they were having problems with and what they needed help with rather than typing down a load of questiosn expecting everyone to do it for them then it would be alot easier to help them?
5. Bono did you really need to post 4 messages all saying the same thing, the answer which had already been given in my post, adk knew that there was two conflicting answers and i had posted the right way to do so why cluster the thread will junk. If there was really a problem post it in a PM to adk.
6. (Original post by bono)
You made a mistake mate, check again.
Yeah, oops. I did it quickly.

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Updated: April 19, 2004
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