Question

Boknoy carried a 50 kg sack of rice to the rooftop of a building (16 meters high). Since Boknoy is a bit heavy (he is 100 kg), he finished the task in 10 minutes. How much power was expended by Boknoy?

a) 980 W
b) 600 W
c) 960 W
d) 6000 W

Answer 1

To calculate the power expended by Boknoy, we can use the formula Power = Work / Time. By calculating the work done and substituting the values into the formula, Boknoy expended approximately 13.07 Watts of power.

Step-by-step explanation:

To calculate power, we can use the formula:

Power = Work / Time

In this case, Boknoy carried a 50 kg sack of rice to a height of 16 meters in 10 minutes. To find the work done, we can use the formula:

Work = Force x Distance

The force can be calculated as the weight of the sack of rice, which is the mass (50 kg) multiplied by the acceleration due to gravity (9.8 m/s^2). The distance is 16 meters. Therefore, the work done is:

Work = (50 kg x 9.8 m/s^2) x 16 m = 7840 J

Finally, we can substitute the values into the power formula:

Power = 7840 J / (10 min x 60 s/min) = 13.07 W

Therefore, the power expended by Boknoy is approximately 13.07 Watts.