6. Intro to Forces (Dynamics)

Which of the following forces can cause an object to move?

In (figure 1), two of the three forces acting on an object in equilibrium are shown. Which statement best describes the third force required for equilibrium?

Which instrument do scientists commonly use to measure $\mathrm{force}$ in experiments?

In which of the following situations are unbalanced forces acting on an object?

In constructing a free body diagram for an object, is it appropriate to include non-contact forces such as $gravity$ or $electric$ force along with contact forces?

Which of the following best describes an applied force in the context of free body diagrams?

Which of the following materials is a good electrical insulator?

In a free body diagram, which force is typically represented by a vector pointing perpendicular to the surface of contact between two objects?$\stackrel{\uparrow }{F}$