In the context of types of forces and free-body diagrams, which statement best describes a force?

In the context of types of forces and free-body diagrams, what two aspects of a force do scientists measure?

In the context of types of forces and free-body diagrams, which of the following is a good example of a contact force?

Which of the following situations is an example of an unbalanced force acting on an object?

Which of the following could be an example of balanced forces acting on an object (net force $F_{\mathrm{net}}=0$)?

In the context of types of forces used in free-body diagrams, which of the following is an example of a non-contact force?

In the context of forces and free-body diagrams, which of the following is a noncontact force?

In a free-body diagram for a block sliding to the right on a horizontal surface, how does kinetic friction affect the block's motion when no other horizontal forces act on it?

In a free-body diagram, a block is pulled to the right by $12N$ while friction acts to the left with magnitude $5N$. What is the net horizontal force on the block?