Unit 1 - Module 2 DEFINITIONS Forces in action 2.0 / 5 based on 2 ratings ? PhysicsForcesASOCR Created by: LouisaCreated on: 04-03-13 18:12 (Resultant) force A push/pull on a object; measured in N 1 of 15 Newtons The force that causes a mass of 1kg to have an acceleration of 1m/s every second 2 of 15 Weight =mg; gravitational force on a body; measured in N 3 of 15 Terminal velocity When air resistance (upwards) is equal to weight (downwards), therefore there's 0 resultant force and 0 acceleration 4 of 15 Drag The resistive force that acts on a body when dragged through a fluid 5 of 15 Centre of gravity The point at which the entire object's mass seems to act upon 6 of 15 Couple Pair of equal and parallel but opposite forces, that tends to produce rotation 7 of 15 Moment =force*perpendicular distance from a stated point; measured in Nm 8 of 15 Torque The turning effect due to a couple; measured in Nm 9 of 15 Density =mass/volume 10 of 15 Pressure =force/area; measured in Pa 11 of 15 Pascal Represents a force of 1N spread over an area of 1m(squared) 12 of 15 Braking distance The distance it takes for a car to stop once the brakes have been applied 13 of 15 Thinking distance The distance it takes for the person to realise the need to stop and to applying the brakes 14 of 15 Stopping distance =braking distance+thinking distance 15 of 15
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