Higher Faster Stronger 4.0 / 5 based on 1 rating ? PhysicsForcesASEdexcel Created by: Joelle LamingCreated on: 03-01-13 15:12 What is a scalar? Give examples. A quantity with only magnitude. E.g. distance, temperature. 1 of 29 What is a vector? Give examples. A quantity with both magnitude and direction. E.g. acceleration, velocity. 2 of 29 What is the gradient of a displacement-time graph? Velocity. 3 of 29 What is the gradient of a velocity-time graph? Acceleration. 4 of 29 What is the area of a velocity-time graph? Displacement. 5 of 29 What is the equation for speed? Distance/time 6 of 29 What is the equation for acceleration? Velocity/time 7 of 29 Recall experiment to measure gravity. Ball bearing and trap door, different displacements, measure time, plot graph, gradient =2/g 8 of 29 List the equations of motion. v=u+at, s=vt-1/2at^2, s=ut+1/2at^2, s=1/2(u+v)t, v^2=u^2+2as 9 of 29 Newton's first law? If there is no resultant force acting on a body it will remain at rest or move at a constant speed. 10 of 29 Newton's second law? Acceleration is directly proportional to force and inversely proportional to mass. F=ma 11 of 29 Newton's third law? Equal and opposite reaction force, same type, magnitude and line. different direction and bodies. 12 of 29 Define projectile motion The horizontal and vertical motion are independent. 13 of 29 work done = force x distance 14 of 29 power = work done or energy transferred/time 15 of 29 kinetic energy = 1/2mv^2 16 of 29 GPE = mgh 17 of 29 when are kinetic energy and GPE equal? When there are no external forces applied 18 of 29 Energy can never be... created or destroyed, it can only be transferred. 19 of 29 Recall experiment to find acceleration 2 light gates, measure two times for a piece of card/trolley, initial and final velocity, use equation for acceleration. 20 of 29 Recall experiment for F=ma. trolley on friction compensated slope, 2 light gates, increase no. elastic bands or mass of trolley, graph. 21 of 29 Define tension A pulling force found in a string or cable. 22 of 29 Define weight mass x gravity 23 of 29 Define friction A force that resists the relative motion of things sliding against each other. 24 of 29 Define air resistance A.K.A drag, force acting against an object 25 of 29 Define upthrust An upward force acting on a body that is partly or fully immersed in a fluid. 26 of 29 Define viscous drag A resistive force acting on a material passing through a fluid. 27 of 29 Define lift A mechanical force generated by a solid object moving through a fluid 28 of 29 Define normal reaction force Perpendicular to the contact force. 29 of 29
Comments
Report