Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m s^–1 . Calculate the initial recoil velocity of the rifle.

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m s-1 . Calculate the initial recoil velocity of the rifle.

Answers (1)

best_answer

Here we will use conservation of momentum : 

                                   Initial momentum of system ( rifle + bullet )    =   Final momentum of system

                                                                       m_1u_1\ +\ m_2u_2\ =\ m_1v_1\ +\ m_2v_2

or                                                              4\times 0\ +\ 0.05\times 0\ =\ 4\times v_1\ +\ 0.05\times 35

or                                                                                   -4 \times v_1\ =\ 1.75

or                                                                                               v_1 \ =\ -\ 0.4375\ m/s

The negative sign shows that velocity is opposite to that of the bullet. This is because the force on the rifle will be opposite by bullet (action-reaction pair).

Posted by

Devendra Khairwa

View full answer

Similar Questions

Trending Articles/News

anam-khan

Board Exam Date 2025 Live: Bihar Class 10, 12 model papers out, time table soon; updates on CBSE, UP
anam-khan

CBSE Class 10 board exams from February 15 to March 18; download date sheet 2025 PDF

Latest Question