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Kinetic and Potential Energy Worksheets (Definition, Types and Examples)

Grade 6 Science Worksheets

Kinetic energy is the energy possessed by an object due to its motion. It depends on the object’s mass and velocity, where higher mass and faster velocity result in greater kinetic energy. On the other hand, potential energy is the energy stored within an object based on its position or configuration in a system. The potential energy can be associated with gravitational forces, elastic properties, or even chemical bonds. When the object’s position or configuration changes, this potential energy can be converted into kinetic energy or other forms of energy, following the principle of conservation of energy.

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Energy can be broadly classified as potential or kinetic energy.

  • Potential energy is the energy stored in a body by virtue of its position.
  • Kinetic energy is the energy in a body due to its motion.

Potential energy

The energy possessed by an object due to its relative position is called potential energy. It is the stored energy that is ready to use. It can be classified into – Doubts? A 6th-grade science tutor can help.

Potential energy

The energy possessed by an object due to its relative position is called potential energy. It is the stored energy that is ready to use. It can be classified into –

1) Gravitational potential energy –

An object suspended at height has gravitational potential energy. For example, a ball or a skier at a height. A raised hammer possesses gravitational potential energy that holds the ability to displace a nail (work).

The higher and bigger in mass, the greater would be their potential energy! The potential energy can be calculated by multiplying the mass, acceleration due to gravity (a constant), and the height of the object.

Suppose you and your friends start skiing from the same height, who would have the maximum potential energy at the top? The lightest or the heaviest guy?

2) Magnetic Potential Energy –

We have learnt that opposite poles of two magnets attract and their like poles repel. The closer the opposite poles of two magnets, the more is the potential energy in them.

3) Chemical potential Energy –

The energy stored in food, fuels, batteries are examples of chemical energy. When we eat food, the chemical energy in food gets transformed to give us the energy to do mechanical work.

4) Elastic Energy –

Spring has more potential energy when it is compressed or stretched. For example, when we wind a mechanical clock, we are storing potential energy in its spring. As the spring loosens, energy is released slowly that turns the hands of the clock! When an arrow is placed in a bow with the string pulled back, the arrow has potential energy and can go far and even hurt someone (work).

5) Nuclear Energy –

The amount of energy released when atoms split is huge. This process is called nuclear fission and the energy released can be tapped to generate electricity.

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Kinetic energy

Kinetic energy is the energy of mass in motion.

Kinetic energy can be classified into five types –

1) Radiant Energy –

Solar energy, light from bulbs and other lighting devices, heating elements in toasters and other appliances, x-rays, radio waves are examples of radiant kinetic energy that travel or move in waves or particles.

2) Thermal Energy –

While baking a pizza or boiling water, the molecules in them move as they release heat, they are examples of thermal energy.

3) Sound Energy –

Our voices, speakers, musical instruments, chirping of birds or any sound is caused by vibrations of particles. The source of sound creates waves that reach our eardrums through these vibrations.

4) Electrical Energy –

Electricity is the flow of electrons around a circuit. So there is movement all around us as we switch on the lights and heaters, it also means that all the electrical appliances in our houses work on this kinetic energy!

5) Mechanical Energy –

Any visible moving body around you possesses mechanical energy – a moving car, a moving ball, a running girl, a boy playing the piano with his moving fingers, etc. Aside from this, wind and a flowing river also have mechanical energy that we harness to generate electricity. Mechanical energy has two types of energy, such as potential and kinetic energy.

Kinetic energy depends on the mass and velocity of the object. The greater the mass and velocity, the greater would be the magnitude of kinetic energy.

It can be represented as follows –

This means that if the velocity of the object doubles, it’s kinetic energy would quadruple!

The potential and kinetic energy in a pendulum

Energy can be transformed from one form to another. The best example of potential energy converting into kinetic energy and vice versa is a pendulum. When we hold a pendulum on one side, it has a certain amount of potential energy. When we let it go, the pendulum will swing back and forth. The potential energy thus is converted into kinetic energy and back to potential and so on and so forth over and over again.

  • At position A, the bob has potential energy. As the bob moves down to B and C, the potential energy starts to get converted into kinetic energy.
  • At C, all the energy is converted into kinetic energy.
  • At E all the energy is converted back to potential energy.
  • At B and D, the bob has a combination of both.

Ideally, as per the law of conservation of energy, the bob should keep moving forever. But the bob eventually stops as it loses energy in the form of friction with air, heat, and sound.

Trivia: William Rankine of Scotland had introduced the term potential energy in 1853.

Check Point

  1. Indicate whether the following have potential or kinetic energy –

       a) A stationary apple on a tree.    b) Sunrays     c) A speeding car

       2. A sound is a form of kinetic energy that travels by _____ of particles around us.

       3. Splitting of some atoms releases ____ energy.

       4. A mechanical clock works with the help of _____ energy.

       5. Potential energy depends upon the mass and ____ of the object.

Answer Key

  1. a) P.E.   b) K.E.  c) K.E.
  2. vibrations
  3. nuclear
  4. chemical
  5. height
What is kinetic energy?

Kinetic energy is the energy an object possesses due to its motion. It is directly proportional to the mass and square of the velocity of the object. When an object is in motion, it has the potential to do work and cause changes in its surroundings.

What is potential energy?

Potential energy is the energy stored within an object based on its position or configuration relative to its surroundings. It can be associated with gravitational potential energy, elastic potential energy, or chemical potential energy, depending on the forces or interactions involved.

How are kinetic and potential energy related?

The relationship between kinetic and potential energy lies in the principle of conservation of energy. As an object moves, potential energy can be converted into kinetic energy and vice versa. For example, when a ball is thrown upwards, it gains potential energy due to its increased height, and as it falls back down, that potential energy converts into kinetic energy.

Can potential energy be negative?

Yes, potential energy can be negative depending on the reference point chosen. For instance, when an object is at a lower level compared to a chosen reference point, its gravitational potential energy is negative because it would require work to move the object upward to the reference point.

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Image Credits –

https://learnenglishkids.britishcouncil.org/word-games/daily-routines
https://www.atkinsongraphic.com
https://cpsbla.org/transportation/
https://www.theclockdepot.com/Cuckoo_Clocks.html
http://max.cs.kzoo.edu/gifs/tools/index.html
http://theproductiveteacher.org/mechanical-energy
https://scholars.unh.edu/cgi/viewcontent.cgi?article=1020&context=sustainability
https://okfirst.mesonet.org/train/meteorology/Radiation.html
https://www.physicscentral.org/experiment/physicsathome/drummingfingers.cfm
https://sciencetrek.org/sciencetrek/topics/force_and_motion/facts.cfm
https://brainly.com/question/10546232

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