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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: - A ray of light is incident on a transparent glass slab of refractive index 1.62
- A ball moving with velocity 2 m/s collides head on with another stationary ball
- A particle moves along the x-axis such that its co-ordinate (x) varies with time (t)
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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
- A ray of light is incident on a transparent glass slab of refractive index 1.62
- A ball moving with velocity 2 m/s collides head on with another stationary ball
- A particle moves along the x-axis such that its co-ordinate (x) varies with time (t)
- A ray of light is incident at an angle of incidence i, on one face of a prism
- Two strings A and B, made of same material are stretched by same tension
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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