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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: - The effective length of magnet is 31.4 cm and its pole strength is 0.8Am.
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
- The molecular weight of a gas is 44. The volume occupied by 2.2 g of this gas
- In thermodynamics processes which of the following statements is not true?
- The potential of a large liquid drop when eight liquid drops are combined is 20 V.
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 effective length of magnet is 31.4 cm and its pole strength is 0.8Am.
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
- The molecular weight of a gas is 44. The volume occupied by 2.2 g of this gas
- In thermodynamics processes which of the following statements is not true?
- The potential of a large liquid drop when eight liquid drops are combined is 20 V.
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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