Problem with object moving up an incline.

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The discussion revolves around a physics problem involving a 96 kg box being pushed up a 21-degree incline at a steady speed of 3.2 m/s. The key questions are about calculating the force applied parallel to the incline and the horizontal force required for the same effect. Clarification is sought on what "parallel to the plane" means, with an emphasis on resolving the weight of the box into components. It is noted that the force of friction is also parallel to the incline. Understanding these components is crucial for solving the problem accurately.
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Homework Statement



A box of mass 96 kg is pushed up an inclined plane which makes an angle of 21 degrees with the horizontal. The box moves at a steady speed of 3.2 m/s.

(a) What force, parallel to the plane, is being applied? (4 marks)

(b) What horizontal force is require to produce the same results? (2 marks)

Homework Equations



I can't name any off the top of my head.

The Attempt at a Solution



I'm having some trouble understanding mostly Part A of this question. What does it mean by parallel to the plane? Is it like the force of friction or gravity?
 
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The weight acts vertically downwards. You want to resolve this weight into two components, one parallel to the plane and one vertical to the plane.

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The force of friction is parallel to the plane..
 

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