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A machine gun fires 10 bullets/s, each of mass 10g, the speed of each bullet is 20 cms⁻¹, then force of recoil is
Options
(a) 200 dyne
(b) 2000 dyne
(c) 20 dyne
(d) None of these
Correct Answer:
2000 dyne
Explanation:
Time taken for 1 bullet = 1/n
Force = the rate of change of momentum = mvn
= 10 x 20 x 10 = 2000 dyne
Related Questions: - Ice is wrapped in black and white cloth. In which cases more ice will melt
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- If the nucleus ²⁷₁₃Al has nuclear radius of about 3.6 fm
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Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Laws of Motion
(103)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Ice is wrapped in black and white cloth. In which cases more ice will melt
- The horizontal range of a projectile is 4√3 times the maximum height achieved
- If the nucleus ²⁷₁₃Al has nuclear radius of about 3.6 fm
- Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
- A beam of light consisting of red, green and blue colours is incident on a right
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Laws of Motion (103)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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