Lesson: Systems of Objects

Physics

In this lesson, we will learn how to analyze the changes in the properties of systems of objects and the forces involved in such changes.

Worksheet: 4 Questions

Q1:

A system consists of two identical objects, as shown in the diagram. The objects exert repulsive forces on each other. At a time 𝑡, the objects approach each other moving at velocities vv=. The objects collide, and at a time 𝑡 they recede from each other moving at velocities vv=, where vv> and vv>. The separation of the objects is the same at 𝑡 and 𝑡.

Which of the following properties of the system are different at 𝑡 and 𝑡?

Which of the following types of forces explains any changes to the system?

Q2:

A system consists of two identical objects, as shown in the diagram. The objects exert repulsive forces on each other. At a time 𝑡, the objects approach each other moving at velocities vv=. The objects collide and at a time 𝑡, they recede from each other moving at velocities vv=, where vv= and vv=. The separation of the objects is the same at 𝑡 and 𝑡.

Which of the following properties of the system are different at 𝑡 and 𝑡?

Which of the following types of forces explains any changes to the system?

Q3:

A system consists of four identical objects, as shown in the diagram. The objects exert both attractive and repulsive forces on each other that result in a zero net force exerted on each object. Between times 𝑡 and 𝑡, the positions of the objects are changed and the separations of each object are the same at 𝑡 and 𝑡. At 𝑡 and 𝑡, the objects are at rest.

Which of the following properties of the system are different at 𝑡 and 𝑡?

Which of the following types of forces explain any changes to the system?

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