Knowledge Organiser – Motion

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Presentation transcript:

Knowledge Organiser – Motion Key Terms Knowledge Organiser – Motion Diagrams Terminal velocity When the weight of a falling object is balanced by resistive forces. Inertia Inactivity. Objects remain in their existing state of motion – at rest or moving with a constant speed in a straight line – unless acted on by an unbalanced force. Thinking distance The distance a car travels while the driver reacts. Braking distance The distance a car travels while the car is stopped by the brakes. Stopping distance The sum of the thinking distance and braking distance Closed system A system with no external forces on it. Distance-time graphs Gradient (dis/time) = speed s = d ÷ t speed = distance ÷ time. a = (v-u) ÷ t acceleration = change in velocity ÷ time. F = m x a Force = mass x acceleration. p = m x v momentum = mass x velocity. (mv - mu) = F x t change in momentum = Force x time. Velocity-time graphs Gradient (velocity/time) = acceleration Area under graph = distance travelled