Question

A rifle with a weight of 35 N fires a 5.1-g bullet with a speed of 230 m/s. (a) Find the recoil speed of the rifle. 0.32844 m/s (b) If a 675-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle. Incorrect: Your answer is incorrect.

Answer 1

0.32877 m/s

0.0162 m/s

Step-by-step explanation:

`m_1=(35)/(9.81)` = Mass of rifle

`m_2` = Mass of bullet = 0.0051 kg

`v_2` = Speed of bullet = 230 m/s

`m_1v_1=m_2v_2\\\Rightarrow v_1=(m_2v_2)/(m_1)\\\Rightarrow v_1=(0.0051* 230)/((35)/(9.81))\\\Rightarrow v_1=0.32877\ m/s`

Speed of rifle is 0.32877 m/s

`m_3v_3=m_2v_2\\\Rightarrow v_3=(m_2v_2)/(m_3)\\\Rightarrow v_3=(0.0051* 230)/((35+675)/(9.81))\\\Rightarrow v_3=0.0162\ m/s`

Speed of rifle and man 0.0162 m/s