bullet is fired at a plank of wood with a speed of 200m/s after passing through the plank its speed reduces to 180m/s if the mass of the bullet is 10g and the thickness of wooden plank is 1m the Average resistance offered by the plank is _
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Bullet is fired at a plank of wood with a speed of 200m/s after passing through the plank its speed reduces to 180m/s if the mass of the bullet is 10g and the thickness of wooden plank is 1m the Average resistance offered by the plank is _
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