## Which of the following objects has the greatest kinetic energy?

## Physics – mechanics:work, energy, and power examples (12

Consider a cannonball whizzing through the air. When a ball strikes a wooden target, it causes the fibers in the wood to splinter and push apart, resulting in a hole. To make the hole, work must be done; fibers must be pushed aside, implying that a force must be applied over the distance they travel. Since the cannonball does work when it reaches the wood, a cannonball in flight obviously has the potential to do work—that is, it has energy. Kinetic energy is what we call the energy of motion.

In nature, there are many examples of kinetic energy. Kinetic energy can be found in a whale swimming through water, a bird soaring, or a predator capturing its prey. A speeding car, a flying Frisbee, a dropping leaf, and everything else in motion have the same impact.

Our intuition tells us that the amount of kinetic energy found in any moving object is governed by two factors. To begin with, heavy moving objects have more kinetic energy than lighter ones: a bowling ball traveling at 10 m/s (a very fast sprint) has significantly more kinetic energy than a golf ball traveling at the same speed. In fact, kinetic energy is proportional to mass: if the mass is doubled, the kinetic energy is also doubled.

## Kinetic energy and potential energy – calculating the

A ten-kilogram weight is set on the edge of a four-story building’s roof. The weight is dislodged and falls to the ground. When it comes to weight, where does it have the most potenti… Q.Which of the following is a kinetic energy example?

Thermodynamic…

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### Potential and kinetic energy lesson for kids

Chemists classify energy into two categories. Kinetic energy is the energy held by a moving entity. Kinetic energy exists in the earth’s rotation around the sun, in you walking down the street, and in molecules traveling in space.

The kinetic energy of an object is directly proportional to its mass and the square of its velocity: K.E. = 1/2 m v2. The kinetic energy has units of kilograms-meters squared per second squared if the mass is in kilograms and the velocity is in meters per second. Joules (J) are commonly used to calculate kinetic energy; one Joule equals 1 kg m2 / s2.

That’s right! Since velocity is squared, the kinetic energy of the running man is far higher than that of the walking man. Take note of the amount of energy the moving car has. It’s no surprise that accidents can do so much harm.

The values have been entered correctly. Since velocity is squared, the kinetic energy of the running man is far higher than that of the walking man. Take note of the amount of energy the moving car has. It’s no surprise that accidents can do so much harm.

### How to calculate kinetic energy

Since work is needed to lift objects against Earth’s gravity, gravitational energy is the potential energy associated with gravitational force. Water in an elevated reservoir or held behind a dam demonstrates gravitational potential energy, which is demonstrated by water in an elevated reservoir or kept behind a dam. When an object falls from one point to another within a gravitational field, the object’s gravitational potential energy decreases by the same amount.

Consider the case of a book on top of a table. Some external force opposes the gravitational force as the book is lifted from the floor to the table. The gravitational force provides the “falling” energy that the book gets as it falls down to the floor. If the book falls off the table, the potential energy is converted into kinetic energy by accelerating the mass of the book. The effect of the book hitting the floor converts this kinetic energy into heat and sound.