section 1- forces and motion formulae 0.0 / 5 ? PhysicsForces and MotionIGCSEEdexcel Created by: Iqra.BCreated on: 20-12-14 12:07 Formula for speed average speed = distance moved / time taken 1 of 10 Formula for acceleration acceleration = change in velocity / time taken 2 of 10 formula regarding weight, mass and gravity weight = mass x gravitational field strength (W = mXg) 3 of 10 formula regarding resultant force f = ma (resultant force = mass x acceleration) 4 of 10 formula for momentum Momentum(Kg m/s) = Mass(Kg)x Velocity(m/s) 5 of 10 formula for momentum change Force acting (N) = Change in momentum (kg m/s) / Time taken (s) 6 of 10 formula for moment MOMENT (Nm) = FORCE (N) x perpendicular DISTANCE (m) between line of action and pivot 7 of 10 Principle of moment (if object is balanced) Total Anticlockwise Moments = Total Clockwise Moments 8 of 10 Principle of moment (if object is unbalanced) If the Total Anticlockwise Moments do not equal the Total Clockwise Moments, there will be a Resultant Moment 9 of 10 Formula for the speed of an orbit orbital speed = 2 x π x orbital radius / Time period (v = 2πr /t) 10 of 10
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