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urp:physgen
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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urp:physgen [2021-11-16] nerf_herder |
urp:physgen [2022-02-01] (current) nerf_herder [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) | ||
urp/physgen.1637023090.txt.gz · Last modified: 2021-11-16 by nerf_herder
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