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gravitation class 10 ssc board one shot | gravitation class 10 one shot maharashtra board SSC BOARD

State Board Wale Bhaiya・43 minutes read

The chapter discusses gravitation, focusing on Physics, with key concepts such as Newton's discovery of gravity, Kepler's laws of planetary motion, and the difference between gravity and gravitation. It also covers acceleration due to gravity, free fall, potential energy, and escape velocity in a informative video for 10th standard students.

Insights

  • Newton's discovery of gravity through an apple falling on his head led to the understanding of Earth's attractive force towards objects, distinguishing between gravity (attraction between any two bodies) and gravitation (attraction between any body and Earth).
  • Understanding the difference between gravity and gravitation is crucial, along with recognizing the significance of concepts like centripetal force, Kepler's laws on planetary motion, and Newton's Law of Gravitation, which explain fundamental principles governing the motion of objects in space.

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Recent questions

  • What is the difference between gravity and gravitation?

    Gravity is the attraction between two bodies, while gravitation is the force between a body and Earth.

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Summary

00:00

"Exploring Gravitation: Newton to Kepler"

  • The first chapter of Science for 10th standard students is on Gravitation, with a focus on Physics.
  • The lesson will be completed in a 45-minute to one-hour video with hand-written notes, a new approach for Maharashtra State Board students.
  • Newton Baba's story of discovering gravity through an apple falling on his head is explained.
  • Newton observed the apple falling vertically down, leading him to understand Earth's attractive force towards objects.
  • Gravity is defined as the attraction between any two bodies, while gravitation refers to the force of attraction between any body and the Earth.
  • The concept of Centripetal Force is explained as a force directed towards the center of a circular path.
  • Johannes Kepler's four laws on planetary motion, including the elliptical shape of orbits, are introduced.
  • Kepler observed planets moving in elliptical orbits with two foci, leading to the formulation of Kepler's Laws of Motion.
  • The importance of understanding the difference between gravity and gravitation is emphasized.
  • Students are encouraged to pay attention and focus on the explanations provided in the video for a clear understanding of the scientific concepts discussed.

14:23

Kepler's Laws and Newton's Gravitation Explained

  • Nase faka aa becomes plural when understood.
  • Brother Kepler's statement about the first law is in focus.
  • The Earth orbits the Sun with two focal points.
  • Gravity and speed are affected by the distance between the Sun and Earth.
  • Gravity decreases with distance, reducing the speed of Earth's revolution.
  • The orbit of a planet is elliptical, with the Sun at one focus.
  • The Law of Areas states that equal areas are covered in equal intervals of time.
  • The square of the period of revolution around the Sun is directly proportional to the cube of the distance.
  • Newton's Law of Gravitation involves force being directly proportional to the product of masses and inversely proportional to distance.
  • Acceleration due to gravity is represented by small g, with a constant value of 6.67 x 10^-11 N m^2/kg^2.

29:58

Gravity, Free Fall, and Potential Energy Explained

  • Sludge means Acceleration due to gravity, Capital A means Mass of the Earth, Aa means Radius of the Earth, and G means Gravitational Constant.
  • The value of small ji is 9.8 meters per second squared, but it's better to consider it as 10 for numerical calculations.
  • The acceleration due to gravity (small g) varies, being higher at the poles and lower at the equator due to the Earth's oval shape.
  • The acceleration due to gravity is inversely proportional to the radius (r), meaning if G increases, R decreases, and vice versa.
  • As distance from the center increases, acceleration due to gravity decreases, with the value being zero at the Earth's center.
  • Mass decreases as one penetrates deeper into the Earth, leading to a decrease in acceleration due to gravity.
  • Free fall occurs when an object moves under the force of gravity alone, with true free fall possible in a vacuum.
  • Perfect free fall happens in a vacuum, where there is no air to influence the object's fall.
  • Free fall is when an object falls under gravity alone, while perfect free fall occurs in a vacuum.
  • Potential energy is the energy an object possesses due to its position, with kinetic energy being the energy of motion.

45:23

Energy: Rest, Motion, Gravity, Escape, Infinity

  • Potential energy is the energy an object possesses when at rest, while kinetic energy is the energy it has when in motion.
  • Potential energy is stored in an object due to its position and state, remaining at one place within the object.
  • The formula for potential energy is MG * H, where M represents mass, G is acceleration due to gravity, and H signifies height.
  • Escape velocity is the speed required for an object to overcome gravity and reach infinity, ensuring it doesn't fall back to Earth due to the absence of gravity in space.
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