If the pump used has done work equal to 1 MJ, then the inequality must be fulfilled: Af ≥ A; N * t ≥ A.
Values of variables: N – power of the pump used (N = 500 W); t is the duration of the pump operation (t = 10 min = 600 s); A – required work (A = 1 MJ = 1 * 10 ^ 6 J).
Calculation: N * t ≥ A.
500 * 600 ≥ 1 * 10 ^ 6.
0.3 * 10 ^ 6 ≥ 1 * 10 ^ 6 (incorrect).
Answer: The pump used will not have time to complete a work equal to 1 MJ in 10 minutes.
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