A bullet of mass 30 g moving with a speed of 500 ms penetrates 10 cm into a fixed target. Calculate the average force exerted by target on the bullet.
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A bullet of mass 30 g moving with a speed of 500 ms penetrates 10 cm into a fixed target. Calculate the average force exerted by target on the bullet.
Solution
Mass of bullet,
m = = 0.03kg
Speed (v) =
Initial kinetic energy =
Final Kinetic Energy = 0
Loss in kinetic energy = 3750 J
Suppose:
F = average force applied by block on bullet
S = displacement = 10 cm = 0.10m
Applying work energy principle,
W = Δk
Fs = Δk
F × 10 = 3750
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