when a 4 kg rifle is fired,the 10 g bullet receives an acceleration of 3×106cm/s2.The magnitude of the force acting on the rifle (in newton) is.
A
0
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B
120
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C
300
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D
3000
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Solution
The correct option is C300 Every action has the same and opposite reaction action=ma=101000×3×106100N ma=3×107105=300N reaction force acting on the rifle is 300N