# Mechanics

Watch
Thread starter 1 year ago
#1
Two particles A and B of mass 4 Kg & 3 Kg respectively are connected by a light in-extensible string which passes over a smooth fixed pulley. The particles are released from rest with the string taught.
a) Find the tension in the string
When A has traveled a distance of 2 m it strikes the ground & immediately comes to rest.
b) Assuming that B doesn't hit the pulley find the greatest height that B reaches above its initial position.

It's a mechanics questions and I've tried a lot but couldn't solve it. Somebody help me.ðŸ˜ŸðŸ˜Ÿ
0
reply
1 year ago
#2
(Original post by Akagami no Sadat)
Two particles A and B of mass 4 Kg & 3 Kg respectively are connected by a light in-extensible string which passes over a smooth fixed pulley. The particles are released from rest with the string taught.
a) Find the tension in the string
When A has traveled a distance of 2 m it strikes the ground & immediately comes to rest.
b) Assuming that B doesn't hit the pulley find the greatest height that B reaches above its initial position.

It's a mechanics questions and I've tried a lot but couldn't solve it. Somebody help me.ðŸ˜ŸðŸ˜Ÿ
For part (a):

- make two F = ma equations, onne for each particle.
- each equation should include the tension in the string and the acceleration of the particles.
- treat them as simultaneous equations, eliminate the acceration and you should be able to find the tension.
1
reply
Thread starter 1 year ago
#3
Thanks, but it was b) that I really needed.(Original post by Pangol)For part (a):

- make two F = ma equations, onne for each particle.
- each equation should include the tension in the string and the acceleration of the particles.
- treat them as simultaneous equations, eliminate the acceration and you should be able to find the tension.
0
reply
1 year ago
#4
(Original post by Akagami no Sadat)
Thanks, but it was b) that I really needed.
Would have helped to have said that...

You need to use a two-stage suvat approach. Do one suvat for the period from rest up to the point where A hits the ground, and another from that point until B reaches its highest point.
0
reply
X

Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

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

### Poll

Join the discussion

#### Current uni students - are you thinking of dropping out of university?

Yes, I'm seriously considering dropping out (103)
13.29%
I'm not sure (33)
4.26%
No, I'm going to stick it out for now (238)
30.71%
I have already dropped out (19)
2.45%
I'm not a current university student (382)
49.29%

View All
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

### See more of what you like onThe Student Room

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