A young son works quickly for two hours and prepares 16 items in a day. His old father works slowly for eight hours and prepares 24 items in a day :

Foundation

Physics Foundation

Work Power Energy

Question

son has more power

son has more energy

both have equal power

both have equal energy

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Power is the rate of doing work (energy used per unit time). The son prepares 16 items in 2 hours, so his power is $\frac{16}{2} = 8$ items/hour. The father prepares 24 items in 8 hours, so his power is $\frac{24}{8} = 3$ items/hour. The son has a higher rate, meaning more power. Energy is the total work done. The father prepares more items (24 vs 16), so he uses more total energy.

Final answer: son has more power