Question

Шар, подвешенный на нити, отвели в сторону и отпустили.Назовите и изобразите на чертеже силы, действующие на шар в момент, когда его отпустили и когда он проходит через положение равновесия.

Answer 1

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Answer 2

Forces Acting on a Pendulum

When a pendulum is released from a certain position, there are several forces acting on it. Let's discuss the forces acting on the pendulum at the moment it is released and when it passes through the equilibrium position.

Forces when the Pendulum is Released: - When the pendulum is released, the main force acting on it is the force of gravity, pulling the pendulum downwards. - Another force acting on the pendulum at this moment is the tension in the string, which is directed towards the pivot point of the pendulum.

Forces when the Pendulum Passes through the Equilibrium Position: - As the pendulum swings through the equilibrium position, the tension in the string is still acting towards the pivot point. - At the equilibrium position, the force of gravity is acting perpendicular to the tension in the string, providing the centripetal force required to keep the pendulum in circular motion.

Diagram of Forces on the Pendulum

To better understand the forces acting on the pendulum, a diagram can be helpful. Here's a simple diagram illustrating the forces on the pendulum at the moment it is released and when it passes through the equilibrium position:

      Tension (T)
         /\
        /  \
       /    \
      /      \
     /        \
    /    m     \
   /            \
  /              \
 /                \
/__________________\
        Gravity

In the diagram: - "Tension (T)" represents the tension in the string, directed towards the pivot point. - "Gravity" represents the force of gravity, pulling the pendulum downwards. - "m" represents the mass of the pendulum.

This diagram illustrates the forces acting on the pendulum at the two specified moments.

Remember, the behavior of a pendulum is a classic example of the interplay between gravitational force, tension, and centripetal force.

I hope this explanation and diagram help clarify the forces acting on a pendulum at the specified moments! If you have further questions or need more details, feel free to ask.