Question

You do 25 J of work while using a hammer. The hammer does 18 J of work on the nail. What is the efficiency of the hammer?

physical science
help please

Answer 1

The efficiency of the hammer is 72%.

Step-by-step explanation:

output work/input work x 100%

18J/25J x 100%

0.72 x 100%

72%

Answer 2

72%

Formula: η = Eout / Ein * 100%