m = mass Dh Work x F P= DW but DW = FDx so P = FDx or P = Fv Dt Dt ‘unstopability’ units kgms-1 what happens when things collide? Ans: r = mn Conservation of r: total r is the same before and after Power=rate of en transfer Momentum r . Total en before = Total en after Change in r = final r - initial r Dr = r1 + r2 2 m/s 1 m/s Conservation of Energy 0.3 kg Before 0.3 kg After g = 9.8N/kg = strength of gravity = force that a 1kg mass feels at the surface of the Earth Dynamics and Mechanical Energy Units C and D 1.10 - 1.16 Force = Dr/t N2L rate of change of momentum F = mv - mu = m(v - u) = ma t t iff m is constant Dgpe = mgDh units Ns F Impulse Impulse Close to surface DW = FDx SF= ma t I = Ft = mv - mu = Dr BIG F small t = small F BIG t = Dr KE = 1mv2 DW when F not // to x Expt F µ 1/m F µ a v 3F v 1m 2F 2m 1F 3m Energy transferred = Work done v t t
D1 E K Electricity and Magnetism A B C J Forces and Motion Physics GCSE G L M Investigations 20% Waves H N D2 The Earth and Beyond Radioactivity F I Energy Sources and Energy Transfer
U1 Mechanics and Radioactivity U2 Electricity and Thermal Physics AS is U1 to 3 A2 is U4 to 6 Physics AS/A2 U3 Topics (e.g. Astrophysics) Practical Work U4 Waves and our Universe U6 Synthesis U5 Fields and Forces
A template for making a mind map on the computer (Careful, these can take a lot of time!)
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