Mecânica e máquinas simples · GCSE Physics Topic 5 (Forces & Motion)
Simulador de inércia e primeira lei de Newton
Simulador da primeira lei de Newton e plano inclinado de Galileu: inércia e atrito
- No navegador
- Sem cadastro
- Dedução ao vivo
- Modo projetor
- Folha de exercícios A4
Janela de simulação 3D● 60 FPS
Variáveis de controle do experimento
cm
kg
Deduções e métricas em tempo real
Velocidade na base da rampa
--
Distância de frenagem
--
Tempo de frenagem
--
Resistência por atrito
--
Dedução de fórmulas em tempo real
Fórmula fundamental:
--Substituição de valores:
--Estado físico: --
Exemplos clássicos e armadilhas de exame
Worked Problem
Problema: Why must the cart be released from the same height on the incline across all surface tests?
Derivação passo a passo:
- Control of variables: Equal release height ensures identical bottom velocity v0 (mgh = 0.5mv0²), making distance comparisons valid.
Worked Problem
Problema: A 0.2kg cart reaches 2m/s at base and experiences 0.2N friction on wood. How far does it slide?
Derivação passo a passo:
- Decel a = 0.2/0.2 = 1m/s². Stopping distance s = 2²/(2*1) = 2m. Stop time t = 2s.
Folha de investigação em aula e exercícios
Q1. Variant 1: Can Newton's First Law be directly proven by laboratory experiment alone?
Answer Key: No. Frictionless conditions cannot be fully realized. It is derived through scientific deduction based on empirical observations.
Q2. Variant 2: What determines inertia? Does a faster object possess greater inertia?
Answer Key: Inertia depends solely on mass. It is independent of speed or external forces.
Q3. Variant 3: An airplane flies steadily dropping bombs every 1s. Neglecting drag, what pattern do ground observers see?
Answer Key: By inertia, all bombs retain the airplane's horizontal velocity, forming a vertical straight line directly beneath the aircraft.
Perguntas frequentes e erros comuns
Does an "inertial force" exist?
No! Inertia is an intrinsic property, not a physical force. Say "due to inertia", never "acted on by inertial force".
How do seatbelts mitigate inertia risks in car crashes?
During sudden deceleration, passengers continue forward by inertia. Seatbelts restrain the body, reducing shock force.
What happens to an orbiting satellite if gravity abruptly disappears?
The satellite flies off in a straight line along the tangential velocity vector at constant speed.
When patting clothes to remove dust, whose inertia is being used?
The dust's inertia. The fabric moves abruptly when patted, while the dust particles remain at rest by inertia.