The force is up the slope and parralel to it, the load is essentially raised vertically.
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you mean inclined plane? a simple machine (a plane at an incline) that uses gravity and slope to move objects. e.g.: a slide is an inclined plane. If it were horizontal, you wouldn't go anywhere.
It requires less force to move an object up an inclined plane if the slope is less steep.
When a person is using an inclined plane it decreases the amount of force needed to move the object.
An incline plane allows less effort (pushing force) to be used to move a weight to a higher level without lifting straight up. You have to push it a longer distance, so ideally, the same amount of work is done, but really, due to friction more work is done. Maybe you can't lift a 500 pound barrel, but you can roll it up an inclined plane into the back of a truck.
the less steep it is the less force you will need