A bullet is fired from a gun. The force on the bullet is P given by...

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A bullet is fired from a gun. The force on the bullet is
P given by \( F=600-2 \times 10^{5} t \), where \( F \) is newton and

W \( t \) in seconds. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?
(1) \( 9 \mathrm{Ns} \)
(2) Zero
(3) \( 0.9 \mathrm{Ns} \)
(4) \( 1.8 \mathrm{Ns} \)
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