During a workout, a football player pushes a blocking dummy a distance of 30 m. While pushing the dummy the same distance a second time, what would the player need to change to be certain that power output increases?
Answer
A
The player would need to use a greater force and take more time.
B
The player would need to use a greater force and take less time.
C
The player would need to use a smaller force and take more time.
D
The player would need to use a smaller force and take less time.
Explanation
Power is work divided by time, and the work done while pushing is force times distance. Since the distance stays at 30 m, using a greater force increases the work; taking less time increases power further. Therefore, the player should use a greater force and take less time, as choice B states.
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