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OCR A Unit G481
Spec
Topic
Ref
1.1.1 Make estimates of physical quantities
1.1.2
Scalars and vectors, resultants & resolution
1.1.3
Displacement, speed, velocity and acceleration;
1.1.4
v = u + at , s = ½ (u+ v)t, s = ut +½at2, v2 = u2 + 2as
TAP episode
comments
201
205, 206
206-2
Galileo & Aristotle’s ideas of motion;
Acceleration of free fall g using a falling body;
1.2.1
206-3
Projectile motion
207
F = ma & the newton;
211
Brief mention in 219
Special theory of relativity at very high speeds
1.2.2
Drag & acceleration with drag, terminal velocity
209
W = mg
1.2.3
Triangle of forces
202-2
Centre of gravity & experiment to determine
203
Couples, torque of a couple, moment of force
203
Equilibrium & principle of moments
203
Density assumed. Pressure
not until 601 gas laws
Density = m/V & pressure = F/A
1.2.4
Thinking , braking and stopping distance
Air bags, seat belts and crumple zones
215
nil
Trilateration technique in GPS
1.3.1
Work done, the joule, W= Fx cos θ;
Conservation of energy;
1.3.2
1.3.3
214, 214-1
217
First mention in 215, but
definition assumed
KE = ½mv2
Ep = mgh, exchange between GPE & KE
Power, the watt
217-3
218
First mention is in 416 transformers
Efficiency & its definition
1.3.4
Sankey diagrams.
217
Tensile & compressive force
227
Extension, elastic limit, Hooke’s law and F = kx
227
En = ½Fx, En = ½kx2
229
Stress, strain, Young modulus, UTS
228
228-5 shows regions on
one graph
Elastic & plastic deformation
Stress/ strain graphs
Seat belts only
229