The diagram shows a barrel of weight $1.0 \times {10^3}N$ on a frictionless slope inclined at ${30^ \circ }$ to the horizontal.
A force is applied to the barrel to move it up the slope at constant speed. The force is parallel to the slope.
What is the work done in moving the barrel a distance of 5.0 m up the slope?

$2.5 \times {10^3}J$
2 )
$4.3 \times {10^3}J$
3 )
$5.0 \times {10^3}J$
4 )
$1.0 \times {10^4}J$
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