Kinematics Lecture Notes

Dunman High School (Senior High Physics Department) 9646 Physics Topic 2: Kinematics 2-1 H2 Topic 2 Kinematics Circus stuntmen being shot out of cannons are human projectiles. In the absence of air resistance, they move in parabolic paths until they land in a strategically placed net. Taken from College Physics, Serway/Faughn

Dunman High School (Senior High Physics Department) 9646 Physics Topic 2: Kinematics 2-2 Content • Rectilinear motion • Non-linear motion Learning Outcomes Candidates should be able to: (a) Define displacement, speed, velocity and acceleration. (b) Use graphical methods to represent distance travelled, displacement, speed, velocity and acceleration. (c) Find displacement from the area under a velocity-time graph. (d) Use the slope of a displacement-time graph to find the velocity. (e) Use the slope of a velocity-time graph to find the acceleration. (f) Derive, from the definitions of velocity and acceleration, equations which represent uniformly accelerated motion in a straight line. (g) Solve problems using equations which represent uniformly accelerated motion in a straight line, including the motion of bodies falling in a uniform gravitational field without air resistance. (h) Describe qualitatively the motion of bodies falling in a uniform gravitational field with air resistance. (i) Describe and explain motion due to a uniform velocity in one direction and a uniform acceleration in a perpendicular direction. References: 1 Advanced Level Physics by Loo Kwok Wai 2 College Physics by Young and Geller 3 Physics for Scientist and Engineers (5th Edition) by Serway Physics Tip! To understand Physics, you must be able to understand it (i) Qualitatively – Define, Explain, State, Describe, Discuss, Suggest… (ii) Quantitatively – Calculate, Measure, Determine, Show, Estimate, Suggest… (iii) Graphically – Sketch, Determine, Estimate, Deduce… (iv) Pictorially – Sketch (applied to diagrams) In plain English, you must be able to explain Physics in words, equations & numbers, graphs and diagrams.

Dunman High School (Senior High Physics Department) 9646 Physics Topic 2: Kinematics 2-3 Data speed of light in free space, c = 3.00 × 108 m s-1 permeability of free space, o = 4 × 10-7 H m-1 permittivity of free space, o = 8.85 × 10-12 F m-1 (1/(36)) × 10-9 F m-1 elementary charge, e = 1.60 × 10-19 C the Planck constant, h = 6.63 × 10-34 J s unified atomic mass constant, u = 1.66 × 10-27 kg rest mass of electron, me = 9.11 × 10-31 kg rest mass of proton, mp = 1.67 × 10-27 kg molar gas constant R = 8.31 J K−1 mol−1 the Avogadro constant, NA = 6.02 × 1023 mol-1 the Boltzmann constant, k = 1.38 × 10-23 J K-1 gravitational constant, G = 6.67 × 10−11N m2 kg2 acceleration of free fall, g = 9.81 m s−2 Formulae uniformly accelerated motion, s = ut + 2 1 at2 v2 = u2 + 2as work done on/by a gas, W = pV hydrostatic pressure, p = gh g