The graph shows the force along the path of a trolley…

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The graph shows the force along the path of a trolley. The force rises in a straight line from $0\ \text{N}$ to $10\ \text{N}$ over the first $2\ \text{m}$ , stays at $10\ \text{N}$ from $2\ \text{m}$ to $6\ \text{m}$ , and falls to $0$ at $8\ \text{m}$ .

A graph of the force on a trolley against its position. The force rises in a straight line from 0 at position 0 to 10 newtons at 2 metres, stays at 10 newtons until 6 metres, and then falls in a straight line to 0 at 8 metres. The shape under the line is a trapezoid.

How much work does the force do over the $8\ \text{m}$ ?
The trolley has a mass of $2.5\ \text{kg}$ and starts from rest on a smooth track. How fast is it moving at $8\ \text{m}$ ?

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