- #1

Shah 72

MHB

- 274

- 0

Friction= 1/(sqroot12)×80 cos 30= 20N

I get two equations

T-20=8a and 120-T=12a

a=5m/s^2

I don't know how to calculate the time. Also with this value of acceleration tension value is wrong and the textbook ans is 84N