P5A 0.0 / 5 ? PhysicsForcesGCSEAQA Created by: Mr DaviesCreated on: 31-03-19 10:28 What is the difference between a scalar and a vector? Give examples A scalar (eg. speed) is a quantity with magnitude (size). A vector (eg. velocity) has both direction and magnitude 1 of 8 Name 3 non-contact forces Gravity, electrostatic forces and magnetic forces 2 of 8 What is the equation linking weight, mass and gravitational field strength? W=mg, weight is directily proportional to mass 3 of 8 What is the equation linking work done, force and distance moved in the direction of said force? W=Fs 4 of 8 What is the equation linking force, the spring constant and the extension of a spring? F=ke 5 of 8 What happens when a spring passes its limit of proportionality? It is permanently deformed 6 of 8 What is the equation linking moment, force and distance M=Fd (d=perpendicular distance from the pivot) 7 of 8 What is the equation for pressure in a fluid? P=F/A. Pressure is measured in Pascals, Pa 8 of 8
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