Calculating Rank Pulley Forces with Newton's Equations

[isukatphysics69]

ohhhhh wait a second i think i understand case A now

 

[isukatphysics69]

Ok so case A the acceleration is actually 9.8m/s^2

 

[isukatphysics69]

So for big block = 2kg and small block = 1kg i have

A: acceleration = 9.8m/s^2
B: acceleration = 3.26m/s^2
C: acceleration = -6.55m/s^2
D: acceleration = -3.26m/s^2
E: acceleration = 0

so i put the ranking as A>B>E>D>C and it is incorrect

 

[ehild]

Ok so case A the acceleration is actually 9.8m/s^2

Why should it be 9.8 m/s²?
What is the tension? The tension accelerates the big box. What is the acceleration?

 

[ehild]

So for big block = 2kg and small block = 1kg i have

A: acceleration = 9.8m/s^2
B: acceleration = 3.26m/s^2
C: acceleration = -6.55m/s^2
D: acceleration = -3.26m/s^2
E: acceleration = 0

so i put the ranking as A>B>E>D>C and it is incorrect

A is wrong. What do you mean with negative accelerations? Use the magnitude of the acceleration to rank them.

 

[isukatphysics69]

i am such an idiot i always rush things and make mistakes, so now i see that A is 4.9m/s^2

 

[isukatphysics69]

Ok so the ranking is C > A > B = D > E

 

[isukatphysics69]

Thank you for your patience ehild, i have completed the assignment finally.

 

[ehild]

Thank you for your patience ehild, i have completed the assignment finally.

You are welcome.