To what height should a brick weighing 2 kg be lifted so that its potential energy increases by 19.6 J?

To find out the required lifting height of the brick taken, we use the formula: ΔEp = mк * g * Δhx, from where we express: Δhx = ΔEp / (mк * g).

Const: g – acceleration due to gravity (g ≈ 9.8 m / s2).

Data: ΔEp – change (increase) in the potential energy of the brick taken (ΔEp = 19.6 J); mk is the mass of the brick (mk = 2 kg).

Let’s perform the calculation: Δhx = ΔEp / (mk * g) = 19.6 / (2 * 9.8) = 1 m.

Answer: The lifting height of the brick taken should be 1 m.