A bullet of mass 100 grams moving with velocity of 50 m/s penetrates a wooden block and stops after travelling a distance of 10 cm inside the block. Find the average resistive force exerted by the block on the bullet using the work energy theorem.
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K.E. of the bullet = 1/2 mv^2 = 1/2 *100/1000*50=2.5j
Using the work energy theorem
Work done by retarding force =2.5J
Fretarding ×distance=2.5J
Fretarding = 2.5/10/100=25 N
Explanation:
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