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Einstein Equation: 

PhysicsWork and Energy

Law of conservation of energy: 

PhysicsWork and Energy

Potential energy: 

PhysicsWork and Energy

Kinetic energy: 

PhysicsWork and Energy

Forms of Energy: 

PhysicsWork and Energy

Energy:

PhysicsWork and Energy

Work:

PhysicsWork and Energy

Artificial Satellites: 

PhysicsGravitation

Satellite: 

PhysicsGravitation

The gravitational field strength of the Earth: 

PhysicsGravitation

The gravitational force of attraction of the Earth: 

PhysicsGravitation

Newton’s law of universal gravitation: 

PhysicsGravitation

Neutral equilibrium: 

PhysicsTurning effect of forces

Unstable equilibrium: 

PhysicsTurning effect of forces

Centre of gravity: 

PhysicsTurning effect of forces

Centre of mass: 

PhysicsTurning effect of forces

Principle of the moment: 

PhysicsTurning effect of forces

Torque or moment: 

PhysicsTurning effect of forces

Resolution of that force:

PhysicsTurning effect of forces

Head to the tail rule: 

PhysicsTurning effect of forces

Resultant force: 

PhysicsTurning effect of forces

Like Parallel forces: 

PhysicsTurning effect of forces

Parallel forces:

PhysicsTurning effect of forces

Centrifugal force:

PhysicsDynamics

Centripetal force: 

PhysicsDynamics