a bullet of mass 20 g moving with a velocity of 500m/s strikes a tree and goes out from the other side with a velocity of 400m/s calculate the work done by the bullet in joule in passing through he tree
a bullet of mass 20 g moving with a velocity of 500m/s strikes a tree and goes out from the other side with a velocity of 400m/s calculate the work done by the bullet in joule in passing through he tree
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Verified answer
Given :
Mass of bullet = 20g
Initial velocity = 500m/s
Final velocity = 400m/s
To Find :
Work done by the bullet.
Solution :
■ As per work - kinetic energy theorem, work done by object is always equal to the change in kinetic energy.
We know that, kinetic energy of body of mass m moving at a speed of v is given by
Conversion :
We know that, 1000g = 1kg
∴ 20g = 20/1000 = 0.02kg
By substituting the given values;