Energy

What are the 2 types of energy?

Kinetic and Potential

What are the main examples of kinetic energy?

Thermal and sound

What are the main examples of potential energy?

Gravitational and elastic

What is thermal energy?

Energy that makes objects hot

What is Sound energy?

Vibrations of particles

What is gravitational energy?

Energy stored in an object due to its height and the ability of gravity to make it fall.

What is Elastic energy?

Energy stored by bending, stretching or compressing

What is energy?

Ability to do work

What is work?

Process of transferring energy

Calculation for work

W=FD or W=FDcos0

J expanded is

Kgm^2/s^2

If force and distance are same direction then….

Positive work

If direction and force are opposite direction then…

Negative work

If distance and force are at a 90 angle then…

No work.

Calculation for Ek?

Ek=(1/2m)(v^2)

Calculation for Eg?

Eg=(m)(g)(h)

Calculation for Fs?

Fs=kx

Calculation for Es?

Es=(1/2k)(x^2)

What is conservation of mechanical energy?

(Eg+Ek+Es)initial=(Eg+Ek+Es)final

What does the slope of an FD graph determine?

K

What does the area of an FD graph determine?

Work done/energy stored

What is heat?

Kinetic energy at atomic level

What is temperature?

Average kinetic energy of all particles in a quantity.

Calculation for heat transfer?

EH=(m)(c)(t2-t1)

Heat captaincy of water?

4200J/kgC

Calculation for heat exchange?

(EH)cold= -(EH)hot

Calculation for latent heat of fusion?

Lf=EH/m

Calculation for latent heat of vaporization?

Lv=EH/m

Calculation for power?

P=W/T

Power is measured in?

Watts (W)

W expanded is…

Kgm^2/s^3