# Mechanics 1 - Pulleys question

Watch
Announcements
#1
This question has me a little stumped. My first instinct is to go with a constant acceleration equation, but I'm sure I remember my tutor talking about how when one weight hits the floor, the other continues upwards for a while before falling. Here:

Two particles A and B of mass 4kg and 3kg respectively are connected by a light inextensible string which passes over a smooth fixed pulley. The particles are released from rest with the strings taught.

a) Find the tension in the string.
[Already done, and checked as correct: 33.6N]

b) When A has travelled a distance of 2m it strikes the ground and immediately comes to rest. Assuming that B does not hit the pulley, find the greatest height reached by B above its initial position.

I have an idea of how to work it, but I'm not 100% sure on my method, so I figured I'd ask you guys.
0
5 years ago
#2
You know that the tensions cancel out so you can do F(of particle B) -F(of particle A)=ma????

I'm not sure, I've only been doing this recently in Further Maths AS and I'm not the sharpest tool in the shed :P
0
5 years ago
#3
(Original post by e-mily)
This question has me a little stumped. My first instinct is to go with a constant acceleration equation, but I'm sure I remember my tutor talking about how when one weight hits the floor, the other continues upwards for a while before falling. Here:

Two particles A and B of mass 4kg and 3kg respectively are connected by a light inextensible string which passes over a smooth fixed pulley. The particles are released from rest with the strings taught.

a) Find the tension in the string.
[Already done, and checked as correct: 33.6N]

b) When A has travelled a distance of 2m it strikes the ground and immediately comes to rest. Assuming that B does not hit the pulley, find the greatest height reached by B above its initial position.

I have an idea of how to work it, but I'm not 100% sure on my method, so I figured I'd ask you guys.

look at a similar question in this link

look at Q13 last part
0
X

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

#### Are you travelling in the Uni student travel window (3-9 Dec) to go home for Christmas?

Yes (50)
30.12%
No - I have already returned home (23)
13.86%
No - I plan on travelling outside these dates (37)
22.29%
No - I'm staying at my term time address over Christmas (15)
9.04%
No - I live at home during term anyway (41)
24.7%