Gravitation for All SSC Exams Start Now!!!


We will cover SSC Gravitation in very creative way as required in SSC Exam. In this topic we will cover gravitation concept with PYQ questions. All questions are provided with topic so that we know what is important for us in this topic. You can also share feedback about this topic.

How we do?

  • First we will learn the concept with picture explanation.
  • All important questions attach with the topic.
  • we use flash card for better understanding the concept and learn the fact.
  • At last we use the quiz to check out our performance.

Universal Law of Gravitation

  • Every point mass attracts every other point mass by a force acting along the line intersecting both points. The force is proportional to the product of the two masses and inversely proportional to the square of the distance between them.
  • Gravitational Constant (G): Value is 6.67×10−11 Nm2/kg2 6.67×10−11Nm2/kg2. Discovered by Henry Cavendish in 1798.

  • Description: The force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
  • S.I unit of charge: Coulomb (important directly asked by examiner)

Similarities between Gravitational and Electrostatic Forces

  • Both are non-contact and conservative forces.
  • Work done is independent of the path.
  • Work done in a closed path is zero.

Kepler’s Planetary Laws

  1. Law of Orbits: Planets move in elliptical orbits with the Sun at one focus.

2. Law of Areas: A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.

NatureIntrinsic propertyForce due to gravity
UnitKilogram (kg)Newton (N)
ChangesConstantVaries with gravity

Variation in gravity

Aspect of GravityExplanation
Gravity at Poles vs EquatorGravity is stronger at the poles than at the equator.
Gravity with AltitudeAs altitude increases, gravity decreases.
Gravity on the Moon vs EarthThe moon’s gravity is 1/6th that of Earth’s.

Vary g = 9.8 m/s ~ 10 m/s
Different from “G”
which is constant

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