Physics (AS & A Level) · May / June 2016 · Paper 43 · Question 3
9702
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3(a)[2]
acceleration/force proportional to displacement (from fixed point) acceleration/force and displacement in opposite directions [2]
3(b)[2]
maximum displacements/accelerations are different graph is curved/not a straight line [2]
3(c)(i)[2]
ω = 2π / T and T = 0.8 s ω = 7.9 rad s–1 [2]
3(c)(ii)[2]
a = (–)ω2 x = 7.852 × 1.5 × 10–2 = 0.93 m s–2 or 0.94 m s–2 [2]
3(c)(iii)[3]
∆E = ½ mω2 (x0 2 – x2) = ½ × 120 × 10–3 × 7.852 × {(1.5 × 10–2) 2 – (0.9 × 10–2) 2} = 5.3 × 10–4 J [3]
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