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8124
The principle of equivalence

Introduction:
Free fall is defined as the movement of an object when only the force of gravity acts on it.
A person who was in a spacecraft in an area of the universe in total absence of gravity would see all the objects around him floating.
If, however, without his knowing it, the rockets under the floor capable of accelerating the vehicle upwards were fired, the person would see the objects fall to the ground, as if
the vehicle were in a gravitational field. With this didactic unit it is possible to verify the principle of equivalence between gravity and acceleration proposed by Einstein.

 

Number of experiences: 10

 

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Topics

• The properties of matter
• Newton’s first law
• Newton’s second law
• The inertial references
• The principle of relativity in classical physics
• The force of gravity
• The free fall
• Inertial mass and gravitational mass
• That strange force of gravity
• Newton’s Doubts
• The gravitational oscillator
• When a reference is not inertial; the apparent forces
• The lift
• Einstein’s thought
• Equivalence between gravity and acceleration
• The principle of equivalence in general relativity
• Consequences of the principle of equivalence

Equipment supplied

• 1 Dynamometer 1N
• 1 Magnetic anchor
• 1 Rod with hook
• 1 Metal cylinder with hook 5g
• 1 Table vise
• 3 Metal rods
• 1 Support for vertical magnet
• 1 Support for horizontal magnet
• 1 Coil 400 turns
• 1 Coil 1600 turns
• 2 Core for threaded reel
• 2 Threaded disc
• 3 Electric cable 100 cm
• 1 graduated glass 250 cc
• 1 Transparent bottle with iron cap and float
• 1 Magnet
• 1 sheet of aluminum foil
• 1 Newton’s tube
• 1 Hand pump
• 1 Support for dynamometer
• 1 Skeins of thread
• 1 Wooden ball with hook
• 1 PVC ball with hook
• 1 Aluminum ball with hook
• 1 Trolley
• 1 Metal cylinder with hooks 50g
• 1 Table vice with pulley

Necessary material not supplied

• 5 A stabilized low voltage power supply; Cod. 5360

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