Two blocks of masses m 1 = 1.0 kg and m2 = 2.0 kg are connected by a massless elastic spring and are at rest on a smooth horizontal surface with the spring at its natural length. A horizontal force of constant magnitude F = 6.0 N is applied to the block m 1 for a certain time t in which m 1 suffers a displacement Δ x 1 = 0.1 m and Δ x 2 = 0.05 m. Kinetic energy of the system with respect to centre of mass is 0.1 J. The force F is then withdrawn.
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
[ 0.26s
0.52 ms–1, 0.40 J
0.20 J]
t = 
= 0.26 s
Speed = 
= 0.52 ms–1
Kinetic energy = 
= 0.40 J
Kinetic energy w.r.t. CM + Energy stored = 
= 0.20 J
Å = 0.10 J
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