Though the question is not specified here, but this information can determine the following quantity: period T= 6 secs, Frequency F=1/6 Hz, speed of rotation V= 2 pi ft/sec and wave length =pi/3 ft
A and D are definitely wrong because the two rocks have different masses, so it leaves us with B and C. The most logical answer to the question is C <span>The one with greater mass takes more force to stop. </span>
