Six forces lying in a plane and forming angles of 60∘ relative to one another are applied to the centre of a homogeneous sphere with a mass m=6 kg. These forces are radially outward and consecutively 1 N, 2 N, 3 N, 4 N, 5 N and 6 N. The acceleration of the sphere is
1) 0
2) 1/2m/s2
3) 1m/s2
4) 2m/s2
1) 0
2) 1/2m/s2
3) 1m/s2
4) 2m/s2