A women lifts her 100-newton child up 1 meter and carries her for a distance of 50 meters to her bedroom How much work does the women do?

Answer 1

If you move 1 meter against a force of 60 newtons, the energy used (or work done) is 60 Joules. The definition of the Joule is the energy used or work done in moving 1 meter against a force of 1 Newton. This makes the SI system easy to use.

Answer 2

W = 100 J.

When the woman lifts her 100 newton child up 1 meter, she is doing an amount of

work equal to the potential energy the child gains which is; W = F∙h = 100 N (1 m)

= 100 J (joule). When the woman displaces the child 50 m over flat ground rather

slowly (so we can neglect the required kinetic energy for the motion) and neglect

energy spent on friction (included inside the woman's body), the woman is not giving

the child any energy for his change in ubication on a flat ground, so the woman's

work for such action is zero.

The answer to the question is that amount of work done by the woman for the described total action is: W = 100 J.

Answer 3

Work done (joules) = Force (N) x Distance (m)

Work done = 90 x 1

Work done = 90 joules