Download Forms of Kinetic Energy

Infinite Potential: Critical
Current
Mission 1
Defining Energy
ENERGY
• Energy is defined as “the ability to do work.” it is the ability to move
an object using a force.
Potential Energy
• Potential Energy (PE) is stored energy. It is energy that is not yet in
motion. It does, however, have the ability to be transformed into
kinetic energy. By contrast, kinetic energy (KE) is the energy of
motion.
Forms of Potential Energy
• Gravitational potential energy is stored energy that depends on three
things: the mass of an object, the height or potential falling distance
of that object, and the acceleration of the object due to gravity.
PE = (75kg) (9.8 m/s/s)(4m) =2940 J
Forms of Potential Energy
• Elastic- Potential energy due to shape of an object such as a stretched
rubber band, bouncing ball or a bow and arrow.
Forms of Potential Energy
• Magnetic potential energy attraction or repulsion as a result of the
magnetic potential energy stored in magnets.
Forms of Potential Energy
• Electrostatic rises from the attraction and repulsion of electrical
charges and occurs when certain materials (such as a balloon and a
silk cloth) are brought together.
Forms of Potential Energy
• Chemical potential energy is energy stored within the bonds of a
substance such as gasoline in a car, or baking soda and vinegar.
Forms of Potential Energy
• In any chemical reaction, Conservation of Mass is maintained.
Although bonds are broken and new substances are formed, the total
amount of matter does not change.
Forms of Potential Energy
• Nuclear potential energy is the energy stored in subatomic particles.
The atom's nucleus contains most of this energy. This energy can be
released by either splitting or fusing atoms through the processes of
fission and fusion. In these reactions, some mass is transformed into
energy.
Forms of Kinetic Energy
• Mechanical- The energy of an object in motion is called mechanical
energy. The amount of mechanical energy depends upon two
things—mass and velocity.
Forms of Kinetic Energy
• The larger the mass or greater the velocity, the more mechanical
kinetic energy possessed by the object in motion. E.G. protons
associated with coronal mass ejections.
Forms of Kinetic Energy
• Thermal energy is the total energy within a substance. As thermal
energy in a substance is increased, the particles vibrate faster, giving
them the energy to move apart.
http://archive.fossweb.com/modulesMS/kit_multimedia/ChemicalInt
eractions/molecules/particles.html
Forms of Kinetic Energy
• When we measure a substance’s temperature, we are measuring the
concentration of thermal energy.
Forms of Kinetic Energy
• Electrical energy is kinetic energy that results from the movement of
charges like in the electrical wires running through your home.
Forms of Kinetic Energy
• Sound energy- kinetic energy as vibrations in the air causing sound.
Forms of Kinetic Energy
• Electromagnetic energy travels as waves and does not require a
medium through which to travel. This form of energy can travel
through the vacuum of space, and has electrical and magnetic
properties.
Forms of Kinetic Energy
• In a vacuum, electromagnetic waves move at the speed of light.
Sunlight is an example of electromagnetic energy.
• The sun is the primary source of most energy in our solar system. It
heats Earth, provides energy for growing plants, and provides most of
the visible light we use to see
• Law of Conservation of Energy- energy is neither created nor
destroyed, it can only change form e.g. gravitational potential energy
to kinetic energy.
Energy, Work and Power
• Work is a force applied over a distance.
• A joule is the basic unit for energy or work.
Energy, Work and Power
• Power is the rate at which work is performed, how fast work is being
done. Power is measured in terms of watts (W). One watt equals one
joule per second.
Waves
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•
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Waves
Mechanical Waves
Electromagnetic Waves
Compression Waves
Compressions
rarefactions
Transverse waves
Crests
Troughs
Amplitude
Wavelength
Frequency
Formation of a tsunami
• A system is a set of components and processes related by energy
transformations and transfers.
• Energy transfers take place when energy stays in the same form but is
passed between different objects. (e.g. dominoes)
• Energy transformations occur in a system when energy changes into
different forms. Energy transformations can occur within an object, or
between objects. Think about the engine in a car.
• The law of conservation of energy states that energy is neither
created nor destroyed within a system; it is only transferred or
transformed.
• http://www.youtube.com/watch?v=qybUFnY7Y8w
• Waves are the progressive disturbances that transfer energy from one
place to another.
• Mechanical waves, such as sound
or tsunamis, must travel through a
medium such as air or water. When
there is no medium, like in space,
mechanical waves cannot exist.
• http://www.youtube.com/watch?v
=ce7AMJdq0Gw
• Mechanical waves travel at different speeds as they move through
solids, liquids, or gases.
• Electromagnetic waves do not require a medium through which to
travel. These waves can exist in space. When electromagnetic waves
travel in space, they travel at or near the speed of light, which is
about 300,000 km/s (186,000 mi/s) in a vacuum.
• Compression waves vibrate the medium back and forth in the same
direction that the wave travels.
• The areas that are squashed together are called compressions. The
low density region of a mechanical compression wave where the
medium is being stretched is called rarefaction.
• Transverse waves move at right angles, or perpendicularly, to the
direction the energy travels.
• Crests are the high points of the wave, and troughs are the low points
between crests. The height of each crest or the depth of each trough
from the center is called the amplitude.
• The distance from crest to crest or trough to trough in a transverse
wave is called the wavelength.
• Frequency is the number of wave crests that passed by you in a given
amount of time.
• http://zonalandeducation.com/mstm/physics/waves/partsOfAWave/
waveParts.htm
• http://www.youtube.com/watch?v=k2vkwy2vdP4
Formation of a tsunami:
• http://www.google.com/imgres?sa=X&rlz=1T4MXGB_enUS571US572&biw
=1024&bih=527&tbm=isch&tbnid=hcSuRr1scdxsM%3A&imgrefurl=http%3A%2F%2Fwww.youtube.com%2Fwatch%3
Fv%3D4Xebwzb3dDE&docid=Hr_A6rEip8vJvM&imgurl=http%3A%2F%2Fi1.
ytimg.com%2Fvi%2F4Xebwzb3dDE%2Fhqdefault.jpg&w=480&h=360&ei=P
q_iUqzOM4rkQfpyoCYBg&zoom=1&iact=rc&dur=1014&page=2&start=8&ndsp=12&ve
d=0CHYQrQMwCQ
• http://www.youtube.com/watch?v=V2taJExhV6g
• Start at 1:00
• http://www.youtube.com/watch?v=S0p_6G5GIeo