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Two masses 10kg and 20kg are connected by a massless string. A force of 200N acts on 20kg mass. At that instant when 10kg mass has an acceleration 12m/s^2 the energy stored in the spring (k=2400N/m) will be

Manjeet , 6 Years ago
Grade 12th pass
anser 1 Answers
Khimraj

Last Activity: 6 Years ago

Acceleration of 10kg mass =12m/s²
Force=ma
F=10x12=120N will act .
Net force on 20kg mass will be :
200N-120 N=80N

a=F/m
=80/20
=4m/s²
∴ The acceleration of 20kg mass is 4m/s²

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