[问答题]
A diving board oscillati:rg.ng1h q k.jm8b- qes with simple harmoy0oc70q fcmg -8tjom7 nic motion of frequency 1.5 cycles per second. What is the maximum amplit87ocmm7q0f y-gjc o0tude with which the end of the board can vibrate in order that a pebble placed there (Fig. 11–56) will not lose contact with the board during the oscillation?
