A hammer

A hammer weighing 500 g hits the nail at a speed of 3 m/s. What is the average force acting on the nail, which penetrates the board to a depth of 5 cm?

Correct result:

F =  45 N

Solution:

m=500 g kg=500/1000  kg=0.5 kg v=3 m/s s=5 cm m=5/100  m=0.05 m  E=12 m v2=12 0.5 32=94=2.25 J E=W=Fs  F=E/s=2.25/0.05=45 N



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