The diagram depicts a block of mass $m$ being drawn in a straight line across a horizontal surface by a force $F$. Over a time $t$, the block travels a distance $d$. Its average speed is $v$. Which two quantities are needed to work out the work done?
- A$F$ and $d$
- B$F$ and $m$
- C$F$ and $t$
- D$F$ and $v$