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urp:physgen [2021-11-08]
nerf_herder [Optics]
urp:physgen [2022-02-01] (current)
nerf_herder [Newton's 3 laws]
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-==== General Physics ==== +===== General Physics =====
-  * [[#​Newton'​s 3 laws]] +
-  * [[#​Distance,​ time, velocity, acceleration]] +
-  * [[#​Collisions]] +
-  * [[#Inclined plane]] +
-  * [[#​Projectile fired at an angle]] +
-  * [[#Buoyant force]] +
-  * [[#​Gravity]] +
-  * [[#​Kinematics]] +
-  * [[#​Miscellaneous]]+
  
 ====Newton'​s 3 laws==== ====Newton'​s 3 laws====
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 Basic definitions:​ Basic definitions:​
-  * Force is in newtons or pounds. One newton = 1kg * m / s² (the force needed to accelerate 1kg at 1 m/s²)+  ​* **Force** is in newtons or pounds. One newton = 1kg * m / s² (the force needed to accelerate 1kg at 1 m/s²)
     * f = ma     * f = ma
-  * Momentum is p+  ​* **Momentum** is p
     * p = mv     * p = mv
-  * energy ​work (joules) = force * distance+  ​* **energy ​or work** (joules) = force * distance
     * J = F*d = applying 1 newton for 1 meter (units of kg * m²/s²)     * J = F*d = applying 1 newton for 1 meter (units of kg * m²/s²)
     * F = J/d     * F = J/d
-  ​* power = work/time (joules/sec or watts) ​+    * Work is positive if it is applied in the same direction as movement 
 +    * No (net) work is done moving an object horizontally some set distance (unless you overcome friction) - it does not gain or lose potential energy, or have increased kinetic energy at the conclusion 
 +  * **power** = work/time (joules/sec or watts) ​
  
 Fnet = Δp / Δt (since p = mv and Δv/Δtime = acceleration) Fnet = Δp / Δt (since p = mv and Δv/Δtime = acceleration)
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   When parallel force > friction, it is unbalanced and objects will move down the plane   When parallel force > friction, it is unbalanced and objects will move down the plane
   Applied force - friction = net force   Applied force - friction = net force
 +
 +====Friction====
 +Coefficient of friction ​
 +  * μ = f/N  (force applied divided by Normal force)
 +  * fNet = fApp - Ffriction
  
   static friction -    static friction - 
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           N = normal force) must be overcome before the mass moves           N = normal force) must be overcome before the mass moves
     μS = fs/N = m*g*sin(θ) / m*g*cos(θ) = sin(θ)/​cos(θ) = tan(θ)     μS = fs/N = m*g*sin(θ) / m*g*cos(θ) = sin(θ)/​cos(θ) = tan(θ)
-  kinetic friction - normal ​moving friction+  kinetic friction - moving friction
    only one type of friction applies at a time    only one type of friction applies at a time
  
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 DV = dependent variable - the variable measured (changes because of the experiment) y axis DV = dependent variable - the variable measured (changes because of the experiment) y axis
  
 +FBD = free body diagram - a drawing of mass and all the forces that are applied to it.
  
 Back to the [[physics]] page or the [[00_start|start]] page. Back to the [[physics]] page or the [[00_start|start]] page.
urp/physgen.1636398072.txt.gz · Last modified: 2021-11-08 by nerf_herder