# Why is it not necessary to to tell what force is?

## What is necessary to define a force?

In Physics, force is defined as: The push or pull on an object with mass that causes it to change its velocity. Force is an external agent capable of changing the state of rest or motion of a particular body. It has a magnitude and a direction.

## Why do we need to know about forces?

To define a velocity, we must include the direction of travel.) Forces are the reason things speed up, slow down, or change direction — i.e., the reason that things accelerate. Broadly speaking, a force is a push or a pull (so, as you might expect, force is another vector quantity).

## Why is a force not required to keep an object in motion?

In the absence of any forces, no force is required to keep an object moving. An object (such as a ball) tossed in the earth’s atmosphere slows down because of air resistance (a force).

## How Galileo deduced the force is not necessary?

Before Galileo it had been thought that all horizontal motion required a direct cause, but Galileo deduced from his experiments that a body in motion would remain in motion unless a force (such as friction) caused it to come to rest.

## How do you classify forces?

Contact forces can be classified according to six types: tensional, spring, normal reaction, friction, air friction, and weight. Noncontact forces: Forces that take place when two objects do not touch. These forces can be classified according to three types: gravitational, electrical, and magnetic.

## Which is not a force?

The correct option is Impulse.

## What is the focus of Aristotle and Galileo’s idea?

Aristotle says that the heavier things are, the quicker they will fall, whereas Galileo felt that the mass of an object made no difference to the speed at which it fell. Year 5 experimented to find out who was right by dropping things of the same weight but different shape and the same shape by different weights.

## How Galileo inferred objects in vacuum fall is not necessary to sustain horizontal motion?

Galileo proved with his experiments that when objects are dropped simultaneously, they will reach the ground at the same time regardless of their masses and air resistance. In another set of experiments, he discovered that objects fall with uniform acceleration.

## What did Galileo prove to be the same in all falling objects?

Ultimately, he recognized that all falling objects accelerate at the same rate and showed that the distance a falling object travels is directly proportional to the square of the time it takes to fall.

## How did Aristotle’s and Galileo’s views on motion differ from one another?

The Difference between Aristotle’s concept of motion and Galileo’s notion of motion is eleven o’clock That aristotle Affirmed That force is removed from an object it will stop while Galileo said an objects motion is stopped Because of the force of friction.

## Why Galileo did not believe in Aristotle’s theory of motion?

Aristotle did not believe in the void and thought the universe was a continuum. Galileo refined the concept of inertia. Galileo did not believe the ball came to a rest because it desired to be in its natural state. The theory of inertia says that an objects inertia will maintain its state of motion.

## How did Galileo opposes the idea of Aristotle on motion?

As we have seen, Galileo’s concept of inertia was quite contrary to Aristotle’s ideas of motion: in Galileo’s dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because …

## What was impossible for Galileo to test?

Galileo cannot test his hypothesis directly

After Galileo defined uniform acceleration so that it would match the way he believed freely falling objects behaved, his next task was to devise a way of showing that the definition for uniform acceleration was useful for describing observed motions.

## What can you say about Galileo’s view of motion?

Galileo was correct in his statement that objects in motion tend to stay in motion, but he seemed to believe that inertial motion moved equidistant from the center of the Earth. Descartes was the first one to correctly state that an object in motion continues its motion in a straight line.

## How Galileo proved that the Earth wasn’t the center of the universe?

‘On the 27th of February, four minutes after the first hour, the stars appeared in this configuration: The easternmost was ten minutes from Jupiter; the next, thirty seconds. ‘ Galileo had seen three of Jupiter”s four largest moons, effectively proving the Earth was not the center of the universe.

## Who first suggested that Earth was not the center of the universe?

Nicolaus Copernicus

Nicolaus Copernicus proposed his theory that the planets revolved around the sun in the 1500s, when most people believed that Earth was the center of the universe.

## Who proved the heliocentric theory wrong?

But four centuries ago, the idea of a heliocentric solar system was so controversial that the Catholic Church classified it as a heresy, and warned the Italian astronomer Galileo Galilei to abandon it.