A karate student trying to break bricks in half is wondering if it would be more effective to strike these bricks and stop her hand at the top surface of the blocks, or to let her hand bounce after she strikes. How would you advise her, using physics?
Stop hand or bound?
Why?

stop your hand so it doesn't hurt as much and if u stop your hand it would make more of an impact because if your hand bounces it means not enough strength so she should stop her hand

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

need to see circuit to get time constant