Question

A force of 11 N is applied to the handle of a screwdriver being used to pry off the lid of a paint can. As the input force moves through a distance 0.3 m, the screwdriver does 3 J of work on the lid. What is the
efficiency of the screwdriver?

Answer 1

Answer:

ok

Explanation:

A force of 11 N is applied to the handle of a screwdriver being used to pry off the lid of a paint can. As the input force moves through a distance 0.3 m, the screwdriver does 3 J of work on the lid. What is the

efficiency of the screwdriver?

Answer 2

Answer:

joules = mass over a distance

11N*0.3m - 3.3 Joules

efficiency = energy out/energy in *100% energy out energy of the tool = 3 J

Energy in = added energy (man) = 3.3 J

3/3.3*100% = 90.91%