A box is being moved with a velocity (v) by a force (p)(parallel to v) along a level horizontal floor. The normal force is (Fn), the kinetic frictional force is (fk), and the weight of the is box is (mg).
Draw a free-body diagram of this situation
To draw a free-body diagram of this situation, we need to represent all the forces acting on the box as arrows. Here's how you can do it:
1. Draw a rectangle to represent the box.
2. Draw an arrow pointing upwards from the center of the box to represent the weight of the box. Label it as "mg" to denote the force due to gravity.
3. Draw another arrow pointing downwards from the center of the box to represent the normal force. Label it as "Fn" to denote the force exerted by the floor on the box.
4. Draw an arrow pointing to the right from the center of the box to represent the force due to friction. Label it as "fk" to denote the kinetic frictional force.
5. Draw an arrow pointing to the right from the center of the box to represent the force applied to the box. Label it as "p" to denote the applied force.
Make sure the arrows are proportional to the relative magnitudes of the forces. The weight force (mg) and the normal force (Fn) should be equal in magnitude but opposite in direction. Similarly, the force applied (p) and the kinetic frictional force (fk) should also be equal in magnitude but opposite in direction.
By visualizing the free-body diagram, you can better understand the forces acting on the box as it is being moved.