A student does work by pulling a box across a level floor. She then pulls a second box along the same floor. Which row shows that the student is now doing twice the amount of work?
- Aforce used to pull box is doubled; distance the box is pulled is doubled
- Bforce used to pull box is doubled; distance the box is pulled is halved
- Cforce used to pull box stays the same; distance the box is pulled is doubled
- Dforce used to pull box stays the same; distance the box is pulled is halved