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 answer:

F =  45 N

Step-by-step explanation:

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=21 m v2=21 0.5 32=49=2.25 J E = W = Fs  F=E/s=2.25/0.05=45 N



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