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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
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- In a transistor, the value of βis 100, then the value of α will be
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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
- The Davisson- Germer experiment is the direct evidence of
- In a transistor, the value of βis 100, then the value of α will be
- If two bodies are projected at 30⁰ and 60⁰ respectively with the same velocity, then
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
- Light with an energy flux of 25×10⁴ Wm⁻² falls on a perfectly reflecting surface
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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