The ability to do work.
Energy of rest, no motion.
Energy of motion.
Potential energy + Kinetic Energy Ex: riding a bike Ex: bouncing a ball
Energy is neither created nor destroyed.
d. potential energy and kinetic energy
b. sound
c. heat
c. mass and speed
d. a person lifting a weight
b. kinetic energy of the fan blades
d. kinetic energy
d. position
In illustrations A and B….. Points 1 & 5….top of the ramp hill.
Point 1 because he will not be at rest until the top of the other side of the ramp.
No, because illustration A will have a stronger pendulum effect of gravitational potential energy.
Energy seems to decrease in illustration A because the momentum slows down as the skater reaches the middle of the ramp. Gravitational potential energy causes unwanted forms of energy. (a person falling….loss of thermal & chemical energy)
Plants & solar cells use energy from the sun. Plants = use photosynthesis to grow chemically. Solar Cells = capture sunlight to store and use as thermal or electrical energy, etc.
Not all places on Earth have alot of wind or sunlight. Stop Thermal Pollution, use generators for electricity, solar panels and power plants.
The 2 nd air conditioner is more energy efficient because it is not wasting thermal energy.
100 units - 60 units 40 units vacuum suckage
Riding a bike = chemical kinetic potential kinetic Fan = electrical mechanical sound Light bulb = electrical thermal light