The crane lifts a granite slab, the volume of which is 0.4m ^ 3. Find the tension of the cable at the moment of ascent

The crane lifts a granite slab, the volume of which is 0.4m ^ 3. Find the tension of the cable at the moment of ascent if the acceleration is equal to 0.2 m / s ^ 2 the density of granite is 2600.

we first find the mass of granite m = density * volume = 0.4 * 2600 = 1040kg
the load is acted upon by mg and the tension force which is directed on opposite sides T-mg = ma
T = m (g + a) = 1040 (9.8 + 0.2) = 1040 * 10 = 10400 H
response 10.4 kN