A-Level Maths: R4-09 [Forces: Pulley Example 4]

[ltfextreme]

what will the acceleration of particle A (on the smooth table) be if particle B hit the ground?

[jumpo]

Hello, wouldn’t there be a tension arrow pointing down at the top of the string, opposite to the tension arrow of the hanging particle?

[khaled-ighz]

Hi sir
In edexcel book you have 4 tension forces one pointing up and down on both sides ? it's yr1 mechanics pg173 example A
Please help me I'm struggling and would highly appreciate it

[SadiqunhnabiChoudhury]

I've got two questions:
1. How do calculate the force exerted on the pulley by the string in this system?
2. How come the tension on either side of the pulley is the same when the two masses attached to the ends are different??

[melaf]

How do you know if something has a reaction force so here why does A have a reaction force but B doesnt?

[Lewis-nbpn]

I've come across an example whereby you calculate the mass.
Firstly the Tension is calculated by MA.=144N
The acceleration of the system is given as 0.8.
So
Ma=Mg-T
T= M(g-a)
144=M(9.8-0.8)
M=16


I'm unsure why you subtract you subtract accelerations.