Question

1) Work & (Non) Conservative forces John is pushing a 30 kg sofa across a carpet floor. He must overcome a 150 N frictional force to keep the sofa moving. a) How much work has John done if he pushing the sofa 5 metres to the right of its original position? b) How much total work has John done if he then pushes the sofa back to its original position?

          1) Work & (Non) Conservative forces
John is pushing a 30 kg sofa across a carpet floor. He must overcome a 150 N frictional force to
keep the sofa moving.
a) How much work has John done if he pushing the sofa 5 metres to the right of its original
position?
b) How much total work has John done if he then pushes the sofa back to its original position?

1) Work (Non) Conservative forces
John is pushing a 30 kg sofa across a carpet floor. He must overcome a 150 N frictional force to
keep the sofa moving.
a) How much work has John done if he pushing the sofa 5 metres to the right of its original
position?
b) How much total work has John done if he then pushes the sofa back to its original position?

Added by Kathryn D.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Thanks for your feedback!

Confused where to start. Obviously work = force x distance (when in same direction) however we don't specifically have a force or am i to assume it is the 150 which meets the frictional force to overcome it? Work &(Non) Conservative forces John is pushing a 30 kg sofa across a carpet floor. He must overcome a 150 N frictional force to keep the sofa moving a) How much work has John done if he pushing the sofa 5 metres to the right of its original position? b) How much total work has John done if he then pushes the sofa back to its original position?