A concrete slab with a volume of 0.25 cubic meters was raised to a height of 6 meters. What work was done in this case?

To find out the work performed when lifting the specified concrete slab, we apply the formula: Amech = ΔEp = m * g * Δh = ρb * V * g * Δh.

Const: ρb – concrete density (according to the condition ρb = 2000 kg / m3); g – acceleration due to gravity (let us take g ≈ 9.8 m / s2).

Data: V – slab volume (V = 0.25 m3); Δh – change in the height of the slab (Δh = 6 m).

Calculation: Amech = ρb * V * g * Δh = 2000 * 0.25 * 9.8 * 6 = 29.4 * 10 ^ 3 J.

Answer: When lifting a concrete slab, a work of 29.4 kJ was performed.