Atwood machine with masses 1.8 kg and 1.2 kg

[ashvinthecha]

Homework Statement

In an Atwood's Machine, the larger mass is 1.8kg and the smaller mass is 1.2.
(A)Ignoring friction what is the acceleration of the masses?
(B)What is the tension of the string.

- I know you have to find the acceleration to get the tension but i don't know how to find the acceleration.
I think you replace net force with T-(the mass) ut i am also unsure of why you do that.

 

[ashvinthecha]

Pulley question -test tomorrow!

Homework Statement

In an Atwood's Machine, the larger mass is 1.8kg and the smaller mass is 1.2.
(A)Ignoring friction what is the acceleration of the masses?
(B)What is the tension of the string.

Homework Equations

Fnet=ma

The Attempt at a Solution

T-1.2g = 1.2a
T = 1.2g + 1.2a

 

[1irishman]

which mass is the hanging mass?

 

[1irishman]

do you have the answer?

 

[1irishman]

sorry...wrong question

 

[1irishman]

1.96 m/s^2 is a i think.

 

[1irishman]

don't forget to include the 1.8kg mass to get the acceleration