Do you know that there is an easy trick to break a strong rope with your hands?
Tie one end of the rope round your left forefinger, then put it round the hand as shown in the picture.
Now take the rope half a metre lower with your right hand and turn it 4 or 5 times round
the right hand. Close your hands into fists. Hold the fists together, then quickly move your
right fist down and your left fist up. The rope will break in your left fist at the point A.
This easy trick happens because all the force acts on the small point A.
Here the rope acts like a knife and cuts through the point A.
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