Three masses m, 2m and 3m are connected by three vertical springs as shown and are initially in equilibrium. Spring 2 is suddenly cut. Which statements are correct immediately after the cut?

Question

G1 Physics · Accepted Answer

Before the cut, spring extensions correspond to forces 6mg, 5mg and 3mg. Springs 1 and 3 do not change extension instantaneously. Hence m has net 5mg upward, 2m has net 5mg downward, and 3m remains balanced.