Forces in Action 0.0 / 5 ? PhysicsForcesASOCR Created by: GeorginaCreated on: 20-02-14 19:26 A resultant force causes... acceleration 1 of 27 Zero resultant force implies constant velocity(which can also be zero) 2 of 27 One newton... is the force that causes a mass of one kilogram to have an acceleration of one metre per second per second 3 of 27 Weight is the gravitational force on a body 4 of 27 A Couple a pair of equal and parallel but opposite forces producing rotation only 5 of 27 The moment is the force multiplied by the perpendicular distance from a stated point 6 of 27 Density mass per unit volume 7 of 27 Pressure force per unit area 8 of 27 breaking distance the distance a vehicle travels when decelerating to stop 9 of 27 centre of gravity the point at which the entire weight of an object can be considered to act 10 of 27 centre of mass the point at which the entire mass of an object is seen to act 11 of 27 drag the resistive force that acts on a body when it moves through a fluid 12 of 27 fluid a material that can flow from one place to another e.g. liquids and gases 13 of 27 force a push or pull on an object measured in Newtons 14 of 27 global positioning system a network of sattellites used to determine an object's position on the Earth's surface. Used in navigation 15 of 27 gravitational force the force due to a gravitational field acting on an object's mass 16 of 27 Kilowatt-hour unit of energy(kW) ussed by electricity companies when charging for electricity.1kW=1000W for 3600s=3.6MJ 17 of 27 principle of moments for a body in rotational equilibrium the sum of clockwise moments equals the sum of anti-clockwise moments 18 of 27 resultant force the overall force when two or more forces are combined 19 of 27 terminal velocity the velocity at which an object's drag equals its accelerating force. therefore there is no resultant force and zero acceleration 20 of 27 thinking distance the distance travelled from seeing the need to stop to applying the brakes 21 of 27 thrust a type of force due to an engine 22 of 27 torque the turning effect due to a couple measured in Newton metres 23 of 27 triangle of forces if three forces acting at a point can be represented by the sides of a triangle, the forces are in equilibrium 24 of 27 turning forces two or more forces that if unbalanced will cause rotation 25 of 27 upthrust a force on an object due to a difference in pressure when immersed in a fluid 26 of 27 weight the gravitational force on a body measured in newtons 27 of 27
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