𝑠𝑝 = ±𝑠𝑟 × 100% Incertidumbre porcentual *Cuando se realiza una sola medida la incertidumbre es la mitad de la medida más pequeña que se puede leer en la escala del instrumento.
Fórmulas de movimiento parabólico despejadas según la forma de su trayectoria Simétrica Semi- parabólica Caso general 𝒕𝒔 = 𝑡𝑡 = 𝒚𝒎𝒂𝒙
𝑥𝑚𝑎𝑥 =
𝒗𝒚𝒊 𝒈
2𝑣𝑦𝑖 𝑔
𝒗𝒚𝒊 = 𝟐𝒈
2𝑦 𝑔
𝑡𝑐 =
1
𝑦 = 𝑣𝑦𝑖 𝑡 − 2𝑔𝑡 2
1
𝑦 = −2𝑔𝑡𝑐 2
𝑣𝑓𝑦 = 𝑣𝑦𝑖 − 𝑔𝑡
𝑣𝑓𝑦 = 𝑣𝑦𝑖
𝟐
𝑣0 2 sin 2𝜃 𝑔
𝑥 = 𝑣0 𝑡𝑐
𝑡=
𝑣𝑦 = −𝑔𝑡 = − 2𝑔𝑦
Trabajo y Energía Trabajo mecánico 𝑊 = 𝐹𝑑 cos 𝜃 Energía mecánica 𝐸𝑀 = 𝐸𝑘 + 𝐸𝑝𝑔 + 𝐸𝑝𝑒 Teorema del trabajo y la Ek Energía cinética Energía potencial gravitatoria Energía potencial elástica Conservación de la energía Potencia
𝑊 = ∆𝐸𝑘 1
𝐸𝑐 = 2𝑚𝑣 2 𝐸𝑝𝑔 = 𝑚𝑔ℎ 1
𝐸𝑝𝑒 = 2𝑘𝑥 2
𝐹 = 𝑘𝑥
𝐸𝑚𝑖 = 𝐸𝑚𝑓 𝑊 𝑃= = 𝐹𝑣 𝑡
Estática y movimiento rotacional Torque τ = Fd sin 𝜃 Centro de gravedad Σ𝑥𝑖 𝑚𝑖 Σ𝑦𝑖 𝑚𝑖 𝑥𝑐𝑔 = 𝑦𝑐𝑔 = Σ𝑚𝑖 Σ𝑚𝑖 Momento de Inercia 𝜏 = 𝛼𝐼 𝐼 = Σ𝑚𝑖 𝑟𝑖 2
𝒙 = 𝒗𝒙 𝒕
𝑡=
2
− 2𝑔𝑦
2 𝑥 tan 𝜃 − 𝑦 𝑔
𝑣𝑦𝑖 ±
𝑣𝑦𝑖
2
− 2𝑔𝑦
𝑔 Impulso y cantidad de movimiento Impulso 𝐼 = 𝐹∆𝑡 Momento 𝑝 = 𝑚𝑣 𝐼 = ∆𝑝 𝐼 = 𝑚 𝑣𝑓 − 𝑣0 Conservación del momento Σ𝑝𝑖 = Σ𝑝𝑓 Leyes de Newton 1ª Ley Σ𝐹 = 0 2ª Ley Σ𝐹 = 𝑚𝑎 3ª Ley 𝐹12 = −𝐹21 Peso 𝑃 = 𝑚𝑔 𝐹𝑓 = 𝜇𝑁 Fricción 𝑚1 𝑚2 Gravitación 𝐹𝐺 = 𝐺 𝑟2 𝑚𝑣 2 F. centrípeta 𝐹𝑐 = = 𝑚𝑤 2 𝑅 𝑅 Colisiones 𝑚1 𝑣1𝑖 + 𝑚2 𝑣2𝑖 = 𝑚1 𝑣1𝑓 + 𝑚2 𝑣2𝑓
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