write down the factors depend on movent of force and establish their relationship
Answers
Answer:
Explanation:
In the final example of the last section, we saw how we could calculate a dynamic acceleration based on a vector pointing from a circle on the screen to the mouse position. The resulting motion resembled a magnetic attraction between circle and mouse, as if some force were pulling the circle in towards the mouse.
In this section, we will formalize our understanding of the concept of a force and its relationship to acceleration. Our goal, by the end of this, is to understand how to make multiple objects move around the screen and respond to a variety of environmental forces.
Before we begin examining the practical realities of simulating forces in code, let’s take a conceptual look at what it means to be a force in the real world. Just like the word “vector,” “force” is often used to mean a variety of things. It can indicate a powerful intensity, as in “She pushed the boulder with great force” or “He spoke forcefully.” The definition of force that we care about is much more formal and comes from Isaac Newton’s laws of motion:
A force is a vector that causes an object with mass to accelerate.
The good news here is that we recognize the first part of the definition: a force is a vector. Thank goodness we just spent a whole section learning what a vector is and how to program with PVectors!
Let’s look at Newton's three laws of motion in relation to the concept of a force.
Newton’s First Law
Newton’s first law is commonly stated as:
An object at rest stays at rest and an object in motion stays in motion.
However, this is missing an important element related to forces. We could expand it by stating:
An object at rest stays at rest and an object in motion stays in motion at a constant speed and direction unless acted upon by an unbalanced force.
By the time Newton came along, the prevailing theory of motion—formulated by Aristotle—was nearly two thousand years old. It stated that if an object is moving, some sort of force is required to keep it moving. Unless that moving thing is being pushed or pulled, it will simply slow down or stop. Right?
This, of course, is not true. 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). An object’s velocity will only remain constant in the absence of any forces or if the forces that act on it cancel each other out, i.e. the net force adds up to zero. This is often referred to as equilibrium. The falling ball will reach a terminal velocity (that stays constant) once the force of air resistance equals the force of gravity.
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