File:Pulley with elastic string HKALE 1985 AL Applied Maths Paper 1 Q6.gif
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Pulley_with_elastic_string_HKALE_1985_AL_Applied_Maths_Paper_1_Q6.gif (300 × 600 pixels, file size: 253 KB, MIME type: image/gif, looped, 289 frames, 15 s)