Momentum physics. The mass of the hammer is 225 g and its velocity, just before it...
Momentum physics. The mass of the hammer is 225
g and its velocity, just before it hits the nail (Diameter of 0.5
mm), is 5.0 m/s downward. After hitting the nail, the hammer
remains in contact with it for 0.1 s. After this time both the
hammer and the nail have stopped moving.
What is the momentum of the hammer just before it hits the
nail?Show how you work out your answer and give the units and
direction.Momentum =
What is the change in momentum of the hammer during the time it is
in contact with the nail?
Write down an equation which connects change in momentum, force and
time.
Calculate the force applied by the hammer to the nail.Show how you
work out your answer
Homework Answers
The mass of the hammer m=225g =0.225kg
initial speed is 5m/s
The diameter is 0.5mm= 0.5x10-3m
The impulsive time is 0.1s
The initial momentum is P=mv = 0.225x5=1.125kgm/s in he diretion of hammer
The chnege momentum is 
Since the impact time is very short we impulse
F= 1.125/0.1=11.25N is the force acted on the nail.
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