Physics

Problem

A crate is dragged

6\,\text{m}

along a horizontal floor by a

40\,\text{N}

force directed forward. The other forces acting are a

15\,\text{N}

frictional force opposite to motion, weight

200\,\text{N}

downward and normal reaction

200\,\text{N}

upward. Which one of these forces does negative work during the displacement? a) Weight b) Pulling force c) Frictional force d) Normal reaction