For the arrangement in figure, the tension in the string to prevent it from sliding down, is
Diagram showing a block of mass m=1kg on an inclined plane. The angle of inclination is 37∘ . The coefficient of static friction is μ=0.8 . A string is attached to the block, parallel to the incline, pulling it up the slope to prevent it from sliding down.
)
(1) 6 N
(2) 6.4 N
(3) 0.4 N
(4) zero