What is Dynamics?

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DYNAMICS

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Definition:​​

 “Dynamics is the study of how objects move and the forces that affect their motion.”

Explanation:

Dynamics in physics is the branch of mechanics that deals with the motion of objects and the forces that cause that motion. It includes the study of how objects move and change over time, as well as the laws and principles that govern that motion. Dynamics helps to explain and predict the motion of a wide range of physical systems, including everything from subatomic particles to galaxies. It is an important branch of physics that is used in many fields such as mechanics, astronomy, and engineering.

Example:

When a baseball pitcher throws a ball, the ball moves through the air in a certain trajectory. This trajectory is determined by the force with which the pitcher throws the ball, the angle at which the ball is released, and the force of gravity pulling the ball towards the ground. By studying these forces and how they affect the motion of the ball, we can better understand the dynamics of the ball’s movement.

Force:

Force is the agent that changes the state of rest or uniform motion of a body.

Unit:

Its SI unit is Newton (N)

Properties:

  1. Force is required to change the position, state or shape of an object.
  2. Force can act as a pull or push agent.
  3. Force produces acceleration.
  4. It can produce distortion.
  5. Force is a vector quantity.

Did You Know:

 Forces can be classified into several types, such as contact forces, field forces, and action-at-a-distance forces. Some examples include friction, gravity, and electrostatic forces.

 Forces can be classified into several types, such as contact forces, field forces, and action-at-a-distance forces. Some examples include friction, gravity, and electrostatic forces.

Newton:

One Newton (1 N) is the amount of force that can produce 1 m/sacceleration in 1 kg mass.

Factors affecting Force:

  • Force is directly proportional to the mass of the body
  • Force is directly proportional to the acceleration produced in a body

Key Numbers:

The pull of gravity on:

A Fly = 0.001N
An Apple = 1N

The Frictional Force Slowing a Rolling Football = 2N

The Force Required to Squash an Egg = 50N

The Tension in a Rope Towing a Car = 1000N (1kN)

The Frictional Force Exerted by the Brakes of a Car = 5000N (5kN)

The Push From the Engines of a Space Rocket = 1000000N (1MN)

Quiz

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