Physics Paper 1 0.0 / 5 ? PhysicsForcesGCSEEdexcel Created by: patiw2004Created on: 22-11-19 18:13 What is a Scalar Quantity? Scalar Quantities have a size/magnitude but no direction 1 of 28 What is a Vector Quantity? Vector Quantities have a size/magnitude and a specific direction 2 of 28 Equation for Speed? speed (m/s) = distance (m) / time (s) 3 of 28 Equation for Acceleration? acceleration (m/s) = change in velocity (m/s) / time (s) 4 of 28 What is Newton's First Law? As long as the acting forces are balanced, a body will remain at rest or continue at a constant speed. 5 of 28 What is Newton's Second Law? If a resultant force acts on a mass, there will be a change in it's velocity. The force determines size and direction. 6 of 28 What is Weight? Force the body experiences due to mass and gravity. (vector quantity, newtons N) 7 of 28 What is Mass? Amount of matter that is contained in a 3D space. (scalar, kg) 8 of 28 Equation for Weight? weight (N) = mass (kg) x gravity (N/kg) 9 of 28 How does Circular Motion occur? Through a Centripetal force: a force acting inwards along the radius of the circle. 10 of 28 What is Newton's Third Law? Every action has an equal and opposite reaction. 11 of 28 What is Human Reaction Time? The time between stimulus and response. 12 of 28 Equation for Reaction Time? reaction time = 13 of 28 What is Stopping Distance? The total distance over which a vehicle comes to rest. 14 of 28 What are the factors of Thinking Distance? • tiredness • distraction • alcohol • drugs 15 of 28 What are the factors of Stopping Distance? • friction • tyres • road • brakes • mass of car 16 of 28 Equation for Stopping Distance? stopping distance = thinking distance + breaking distance 17 of 28 How is Energy Transferred? • mechanically • electrically • thermally • radiation 18 of 28 What are the Energy Stores? • chemical • kinetic • gravitational potential • elastic • thermal • magnetic • electrostatic • nuclear 19 of 28 What are Closed Systems? No net change to the total energy in the system. 20 of 28 What is Efficiency? How well a machine works. 21 of 28 Equation for Efficiency? efficiency = useful / total 22 of 28 What are Renewable Energy Resources? • solar panels • bio-fuels • hydroelectricity • wind turbines • tidal power 23 of 28 What are Non-renewable Energy Resources? • nuclear fuels (e.g uranium) • fossil fuels (e.g coal, oil, gas) 24 of 28 Equation for Gravitational Potential Energy? gpe (J) = mass (kg) x gravity (N/kg) x h (m) 25 of 28 Equation for Kinetic Energy? ke (J) = 1/2 x mass (kg) x (speed) (m/s) 26 of 28 What are Waves? Waves transfer energy and info without transferring matter. 27 of 28 Equation for Wave Speed? v (m/s) = frequency (Hz) x wavelength (m) OR v (m/s) = distance (m) / time (s) 28 of 28
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