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 Q15. A body executes simple harmonic motion. Which one of the graphs, A to D, best shows the relationship between the kinetic energy, Ek, of the body and its distance from the centre of oscillation?
KE relates to velocity squared. When x = 0 velocity is a maximum - when x = A velocity = zero. Therefore choice C is a non-starter. KE = 1/2 mv2 = 2 = a constant value - a constant multiplied by x2 an x2graph curves upwards from the origin - you should know that from GCSE maths The shape of the graph will therefore be that of choice B |
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2f 2(A2 - x2)
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