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Yuliya22 [10]
3 years ago
5

Forces are _______ which means they need to be determined by not only their numeric value (amount of force in Newton's) but also

their _______.
please help this is a science question
Physics
1 answer:
olya-2409 [2.1K]3 years ago
3 0

Forces are <em>vectors</em>, which means they need to be determined by not only their numeric value (amount of force in Newton's) but also their <em>direction</em>.

Some other examples of vector quantities include displacement, acceleration,  velocity, and momentum.  Each of these isn't complete until you know its size and direction.

There are other quantities that have size but <u><em>no</em></u> direction.  They include distance, speed, volume, temperature, cost, and loudness.  These are called "scalars".

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Explanation: Until the beginning of 20 century, the physics were ruled by Isaac Newton's ideas. He believed that the gravity was a force caused by the objects mass on the space, made them to be draw towards each other. Newton thought that the greater the mass of the object, the more intense was its attraction, which would justify the planet's moovements around the sun and how the gravity between them maintain the planets on solar orbit. Concluding, he believed gravity was a immediate force of action, regardless of the distance of the bodies.

Contrary to Newton's law of gravity, in 1915, the physicist Einstein created the Theory of General Relativity, wich discovered that gravity was, in fact, the deformation caused by the attraction of massive celestial bodies. This deformation, related to the Sun, for example, creates a curvature on the space-time and this curvature are followed by the other planets.

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Answer:

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Answer:

The elevator's free-body diagram has three forces, the force of gravity, a downward normal force from you, and an upward force from the tension in the cable holding the elevator. The combined system of you + elevator has two forces, a combined force of gravity and the tension in the cable.

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