Lesson: Inertia and Newton’s First Law of MotionPhysics
In this lesson, we will learn how to calculate the unknown forces acting on an object so that it remains still or moves at a constant velocity.
Sample Question Videos
Three forces act on a particle, which moves with constant velocity . Two of the forces are and . Find the third force, .
While sliding a couch across a floor, the housemates Liam and Emma exert forces and , respectively, on the couch. is of magnitude 130 N directed due north and is of magnitude 180 N directed east of north. A force is produced by the combination of the forces exerted by Liam and Emma. In evaluating the net force, assume that east corresponds to positive displacement along the and that north corresponds to positive displacement along the .
Find in component form.
Find the magnitude of .
At what angle north of east is directed?
If Liam and Emma’s housemates, Matthew and Mia, disagree with the move and want to prevent its relocation, with what combined force should they push so that the couch does not move?
Two forces and act on an object. What force must be added to and to produce a net force of zero?