Navigate

A machine gun fires 10 bullets/s,each of mass 10 g,the speed of each bullet

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

admin:

Related Questions

  1. A series R-C circuit is connected to an alternating voltage source. Consider two
  2. The de-Broglie wavelength of an electron is the same as that of a 50 KeV X-ray photon.
  3. A galvanometer having resistance of 50 Ω requires a current of 100μA to give full
  4. An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change
  5. Two lenses of power 15 D and -3 D are placed in contact.