What are examples of kinetics?

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Updated January 29, 2020

By Amy Dusto

Both kinetics and kinematics are areas of study in physics that deal with the motion of an object, but the difference between them is that only one also addresses the causes of that motion. Together, they help a physicist to understand both the "what" and the "why" questions related to moving things.

Kinetics is the study of forces that cause motion while kinematics is a mathematical description of motion that doesn't refer to forces.

Other notable differences between kinetics and kinematics include:

• Kinematics doesn't regard the mass of any object in the system to describe its motion, whereas kinetics does.
• Kinematics can be considered a branch of mathematics. Essentially, it deals with applying a set of equations of motion to solve various physics problems.
• Kinetics deals with the laws of motion while kinematics deals with the equations of motion.

The branch of physics known as kinetics deals specifically with analyzing the forces acting on an object (or, when dealing with rotational motion, their analogue: torques). As such, a physicist studying kinetics draws on Newton's laws of motion to study how objects move.

While studying kinetics, a physicist will typically draw force diagrams (also known as free-body diagrams) and use vector math to find values such as net force and the direction of acceleration.

Kinetics falls into the sub-category of classical mechanics known as forces.

The branch of physics known as kinematics deals with using mathematical descriptions – a set of equations of motion – and definitions to explain how real-world objects move about.

Kinematics therefore requires a strong understanding of mathematical concepts such as vectors, scalars and vector addition, as well as physics measurements like velocity, speed, distance, displacement and acceleration.

High school physicists often study kinematics in one dimension (linear motion, like an apple falling from a tree) or in two dimensions (such as projectile motion, like a cannonball leaving the cannon at a diagonal and making an arc in the sky). For motion in two dimensions, they will need to separate a problem into two parts: one for the object's vertical motion and one for its horizontal motion.

Kinematics falls into the sub-category of classical mechanics known as motion.

Consider a classic projectile motion situation: a baseball player throwing a ball through the air. A physicist analyzing the ball's motion with kinematics would calculate factors such as final velocity, time in the air and final position.

A kinetics view of the same thing might be to determine how Newton's second law applies to the ball by quantifying the net force on the ball from the player's throw and gravity.

Another way to analyze the same scenario of a baseball's motion through the air would be to apply an understanding of conservation of energy in order to explain why the ball eventually stops. This analysis, however, belongs to the sub-category of classical mechanics known as energy.

Altogether, the three main categories of study in classical mechanics are forces, motion and energy.

Both kinetics and kinematics are important branches of classical mechanics. They allow physicists to understand the nature of motion in different ways and to calculate different values depending on what they are studying.

In this way, the two fields complement each other. Kinematics might answer more of the "what" questions that specifically describe the motion of an object: its velocity, acceleration, position, time and the like.

But without kinetics, physicists wouldn't also be able to answer the "why" questions, such as what caused the object to begin moving in the first place, and why doesn't that motion continue forever? Where does the acceleration pulling a thrown ball back to the Earth come from? To answer all of these questions, a physicist needs equations and a solid understanding of forces.

This is a complete Post About K.E and Examples of Kinetic Energy. So If You want to learn in detail about K.E in detail, You”ll love the Visual Examples in this post. Let’s Dive Right in.

Contents:

• Kinetic Energy Definition
• K.E equation
• Kinetic Energy Examples
• Lot’s more

Keep Reading ……

What is Kinetic Energy?

Kinetic energy is defined as ” The energy possessed by an object due to its motion.”It derived from the Greek word kinetikos which means motion. It depends on the mass and velocity of an object.  SI Unit of K.E is the joule. It is a Scalar quantity. The kinetic energy formula is expressed as:

Here are some Kinetic Energy Examples:

• when you are walking or running your body is exhibiting kinetic energy.
• A bicycle or skateboard in motion possesses kinetic energy.
• Running water has kinetic energy and it is used to run water mills.
• Moving air has K.E and is used to derives windmills and push sailing boats, similarly, a bullet fired from a gun has kinetic energy and can penetrate into a target because of its K.E.
• Remember, kinetic energy is the energy of motion. The faster the body move,s the more the kinetic energy is formed as a process of movement . for example when a bus speeds up going down a hill, the potential energy of the bus converts into K.E. There is not much potential energy at the bottom of the hill, but there is a great amount of kinetic energy.

Similarly, a basketball shows kinetic energy, the K.E is proportional to the ball’s mass and the square of its velocity. to throw the same ball twice as fast, a player does more work and transfers four times the energy.
See Also: Difference between Kinetic energy and potential energy

• Mechanical energy
• Electrical energy
• Light energy
• Sound energy
• Thermal energy

Detail of these types of kinetic energy given below:

Heat is a form of energy given out by hot bodies. A large amount of heat is obtained by burning fuel. Heat is also produced when motion is opposed by frictional forces.

Examples of thermal energy

• The foods we take provide us heat energy.
• The sun is the main source of heat energy.

Electricity is one of the widely used forms of energy. Electrical energy can be supplied easily to any desired place through wires. We get electrical generators. These electric generators are run by hydropower, thermal power or nuclear power.

Examples of electrical energy

When you knock at the door, you produce sound. A sound is a form of energy. It is produced when a body vibrates; such as vibrating diaphragm of a drum, vibrating strings, of a sitar, and vibrating air column of wind instruments such as flute pipe, etc..

Light is a form of energy. The sun is the major source of light for us. Light helps plants to make food in the process of photosynthesis.

Kinetic energy equation

Consider a body of mass “m” which is projected up in the gravitational field with a velocity “V”, after attaining a maximum height “h”, the body comes to rest. The work done by the body against the gravitational force is given by : Work is done by the body = Force × displacement

Frequently Asked Questions

What are the 5 kinetic energy Examples?

• Wind Mill
• Moving Car
• A bullet from a gun
• Moving Bus
• Cycling

What are 2 types of kinetic energy?

Sound energy and electrical energy are 2 main types of K.E.

What factors affect kinetic energy?

Two factors that affect Kinetic Energy that is:

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