Question

Two masses 10kg and 20kg respectively are connected by a massless spring force of 200N acts on the 20kg mass. At the instant the 10kg mass has acceleration of 12m/s^2, what is the acceleration of 20 kg mass??

Answer 1

200 - kx = 20 a2 ———-1

kx = 10 a1 ———————-2

then kx = 10 x 12 = 120 substitute this value in eq 1

200 - 120 = 20 a2

a2 = 80/20 = 4 m/s2

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