Question

A machine do a work of 100 joule in 20 second. What is its power?

• A. 120 watt
• B. 80 watt
• C. 5 watt
• D. 2000 watt

Answer 1

Answer:

C. 5 watt

Power = Work / time

Given,

• Work = 100 Joule
• Time = 20 seconds

Power = Work / time

= 100/20

= 5 Watt