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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If (range)² is 48 times (maximum height)², then angle of projection is
- If the angle of minimum deviation is 60° for an equilateral prism, then the refractive
- In communication with help of antenna if height is doubled then the range
- If the magnetising field on a ferromagnetic material is increased, its permeability
- Two metal wires of identical dimensions are connected in series. If σ₁ and σ₂ are
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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