A bullet of mass 50g strikes a wooden plank with a velocity of 200m/s and emerges out with a velocity of 50m/s . Calculate the work done by the bullet against the resistive force offered by the plank.
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Considering force applied by the wall to be constant equal to F There are two basic ways in which we can solve this problme Energy conservation Kinematics
1.Energy conservation
mass of bullet to be M
speed of bullet be V
S is distance traversed by bullet in mud wall
now, applying work energy theorem
Change in kinetic energy= Work done
(1/2)*M*V^2= F.S
substituting the given values we get
|F|= 24000 N
but you can replace the value
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