Forces 0.0 / 5 ? PhysicsForcesGCSEAQA Created by: AmyJordan1501Created on: 27-12-17 12:37 What is a vector? Vectors have a magnitude and a direction. 1 of 20 Name some vectors force, velocity, displacement, acceleration and momentum. 2 of 20 What is a Scalar? Scalars have a magnitude but no direction 3 of 20 Name some Scalars. speed, distance, mass, temperature and time. 4 of 20 What is a force? A force is a push or a pull with a object that is caused by interacting with something. 5 of 20 What is a contact force? When two objects have to be touching for the force to act, e.g. friction, air resistance and tension in a rope. 6 of 20 What is a none-contact force? When two objects do not need to be touching for the forces to act, e.g. magnetic force, gravitational force and electrostatic force. 7 of 20 What is gravitational force? Gravitational force is the force of attraction between mass. 8 of 20 What two effects does gravity have? 1) On the surface of a planet it makes all things fall to the ground. 2) It gives everything weight. 9 of 20 How do you calculate Weight? Weight (N) = Mass (Kg) X Gravitational field strength (N/kg) 10 of 20 What relationship does mass have to weight? mass is directly proportional to weight. 11 of 20 What is a resultant force? a resultant fore is the overall force on a point or object. 12 of 20 How do you work out resultant force? add all the forces together then take away any opposite forces. 13 of 20 What is work done? When a force move an object through a distance, energy is transferred and work is done on the object. 14 of 20 How do you calculate work done? Work done (J) = Force (N) X Distance (moved along the line of the action of the force) (m) 15 of 20 How do you calculate resultant force in two directions? draw a triangle with the two forces you know then draw the hypotenuse and the bearing. 16 of 20 How do you calculate spring constant? Force (N) = Spring constant (N/m) X Extension (m) 17 of 20 What is the relationship between the Force and the Extension? Force is directly proportional to Extension. 18 of 20 How do you calculate the Elastic potential energy? Elastic potential energy (J) = 1/2 X spring constant (N/m) X Extension (m) ² 19 of 20 What shape should a Force Extension graph should be? a positive curve 20 of 20
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