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Alex Christie
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Homework Statement
i have a question on D'alemberts principle in which it asks me to find the velocity of a hammer immediately before impact with a pile
the information i have been given is as follows:
mass of hammer;300kg
height of hammer;3.5m
gravity to be taken as;9.81
mass of pile ;500kg
I have solved the question using the conservation of energy technique in which
KE = GPE
0.5mv^2 = mgh
0.5x300xv^2 = 300x9.81x3.5
v=square root of 9.81x3.5/0.5
v=8.287m/s
Homework Equations
KE=1/2mv^2
GPE=mgh
F=Ma=-Fi
The Attempt at a Solution
all attempts at a solution have proved to be futile as i cannot wrap my head around it, i have read about inertia forces and that an applied force must overcome this inertia force in order to accelerate however I am stumped when it comes to this question Any help would be massively appreciated