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Sagot :
The mass of the bullet is 9.7 grams.
As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.
i.e.ME = KE + PE
As given in the problem bullet is fired into a large stationary absorber and comes to rest. So PE = 0.
Temperature measurements of the absorber show that the bullet lost 1729 J of kinetic energy and high-speed photos of the bullet show that it was moving at 597 m/s just as it struck the absorber.
We know that KE = [tex]\frac{1}{2} mv^{2}[/tex], where
KE = kinetic energy = 1729J
m = mass
v = velocity = 597 m/s
Putting these values in above equation we get, m = 9.7 grams
So, the mass of the bullet is 9.7 grams.
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