1. A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your work.
Im very confused

Question

1.	A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your work.
Im very confused

angel.candy · Answer

Total acceleration = (gravity + 1.2) = (9.8 + 1.2) = 11m/sec^2. 
Tension force = (mass x acceleration), = 12 x 11, = 132N.

vipulrakta · Answer

|dw:1480573619901:dw| 
in order to this problem 
t= tenion in the rope in +ve direaction of y axis 
a = acceleration also in +ve dreaction of y axis 
mg = weight of body      _ve direaction of y axis 
 F(net)= tension + weight 
$$F= T+(-mg)$$
$$T=F+mg $$
we know F= ma then  tension
$$T=m(g+a)$$
put given value we get 
T=12(9.8+1.2)
T=132