The man having the weight of 150 lb is able to run up a 15-ft-higb flight of stairs in 4 s...

The man having the weight of 150 lb is able to run up a 15-ft-higb flight of stairs in 4 s. Determine the power generated. How long would a 100-W light bulb have to burn to expend the same amount of energy? Conclusion: Please turn off the lights when they are not in use!