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| physics:energy [2021/03/07 05:36] – created epix | physics:energy [2021/03/15 04:01] (current) – [Elastic Potential Energy] added epix | ||
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| * $w = e_f = e_i$, where $w$ is work, $e_f$ is the final energy, and $e_i$ is the initial energy((derived from the above equation)). | * $w = e_f = e_i$, where $w$ is work, $e_f$ is the final energy, and $e_i$ is the initial energy((derived from the above equation)). | ||
| * $w = FD$, where $w$ is work, $F$ is the force((Newtons)), | * $w = FD$, where $w$ is work, $F$ is the force((Newtons)), | ||
| + | |||
| + | ===== Power ===== | ||
| + | Power is the rate at which work is done. The SI unit of power is the Watt((W)), which is represented as Joules per second((or J/s -> Nm/s -> kg m^2 s^-3)). To convert to shittier units, use Google or remember the conversion yourself idiot. A handout for you: 1 horsepower (hp) is equal to 745.7 watts. | ||
| + | * $P = \frac{w}{t}$, | ||
| + | * $P = FV$((if you think about it, this is actually just a substitution of the work equation $w = FD$ and $V = \frac{\Delta \text{position}}{\Delta \text{time}}$)), | ||
| + | |||
| + | ===== Elastic Potential Energy ===== | ||
| + | Elastic Potential Energy represents the stored energy of a spring. The spring constant((k)) measures the elasticity of a spring, its unit is N/m ((Newtons/ | ||
| + | * $\text{EPE} = \frac{1}{2}kD^2$ where $k$ is the spring constant and $D$ is the displacement of the spring from rest. | ||
