Three friends each do work to push an object across the room. Katie does 400 J of work while pushing her object across the room in 6 seconds. Alice does 300 J of work while pushing her object across the room in 7 seconds. Alyssa does 350 J of work while pushing her object across the room in 5 seconds. Which friend has the largest power output?

Question

Three friends each do work to push an object across the room. Katie does 400 J of work while pushing her object across the room in 6 seconds. Alice does 300 J of work while pushing her object across the room in 7 seconds. Alyssa does 350 J of work while pushing her object across the room in 5 seconds. Which friend has the largest power output?

A. Alyssa
B. They all three have the same power output
C. Alice
D. Katie

Answer 1

Power is defined as the rate at which work is done, which can be calculated using the formula:

Power = Work / Time

Using this formula, we can calculate the power output for each friend:

Katie's power output: 400 J / 6 s = 66.67 W
Alice's power output: 300 J / 7 s ≈ 42.86 W
Alyssa's power output: 350 J / 5 s = 70 W

Therefore, the friend with the largest power output is Alyssa with 70 W of power. The answer is (A) Alyssa.