A student must lift a mass of 4kg at a distance of 0.5 m. The ambient temperature is 298K and the student must lift the mass in 30s. Which of the following values is not necessary to calculate power?
Correct answer: C. Temperature
- A. Mass
- B. Distance
- C. Temperature
- D. Time
Explanation
Option C is correct. To calculate power, you need to know the work done and the time over which that work is done. Work is calculated using mass and distance (Work = Force x Distance, where Force = Mass x Gravity). Time is required to determine power (Power = Work/Time). Temperature does not play a role in this calculation, making it unnecessary for determining power. Hence, the correct answer is temperature.
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