A machine does 80 joules of work in 8 seconds. What is its power?

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Multiple Choice

A machine does 80 joules of work in 8 seconds. What is its power?

Explanation:
Power is the rate at which work is done. It’s found with P = W / t. Here, the machine does 80 joules of work in 8 seconds, so P = 80 J / 8 s = 10 J/s. Since 1 watt equals 1 joule per second, the power is 10 watts. The other numbers would come from different times (for example, 8 watts would need 10 seconds, 80 watts would need 1 second, and 16 watts would need 5 seconds), but with the given values you get 10 watts.

Power is the rate at which work is done. It’s found with P = W / t. Here, the machine does 80 joules of work in 8 seconds, so P = 80 J / 8 s = 10 J/s. Since 1 watt equals 1 joule per second, the power is 10 watts. The other numbers would come from different times (for example, 8 watts would need 10 seconds, 80 watts would need 1 second, and 16 watts would need 5 seconds), but with the given values you get 10 watts.

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