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A hammer of mass m = 0.45 kg is moving horizontally at a velocity of v...

A hammer of mass m = 0.45 kg is moving horizontally at a velocity of v = 6.5 m/s when it strikes a nail and comes to rest after driving the nail a distance Δx = 0.95 cm into a board.

What is the duration of the impact, in seconds, assuming the acceleration of the hammer was constant?

What was the average force, in newtons, exerted on the nail?

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Answer #1

Using equations of motion,

v= 0, u= 6.5 m/s, s= 0.0095 m, m=0.45 kg

Hence,


Acceleration is negative as the speed of the hammer would decrease.

Force experienced would be: ma= 225.15 J

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