Question

एक गोली का द्रव्यमान 10 ग्राम है और वह एक दीवार से 20 मीटर प्रति सेकंड के वेग से टकराती है दीवार का प्रतिरोध 100 किलोग्राम गोली दीवारके अंदर कितनी दूरी तय करेगी ​

Answer 1

Answer:

0.5 m/ sec

Explanation:

Solution :

Here, Mass of bullet=10 g <br> =

kg <br> =0.01 kg <br> Velocity of bullet=300 m/s <br> Mass of gun=6kg <br> And, Recoil velocity of gun=? (To be calculated) <br> Now, putting these values in the relation : <br> Mass of bullet

Velocity of bullet

=mass of gun

Recoil velocity of gun <br> We get :

Recoil velocity of gun <br> So, Recoil velocity of gun=

<br> =0.5 m/s <br> Note. The above prblem can also be solved by calculating the momentum of bullet and the gun separately as follows : <br> Momentum of bullet=Mass of bullet

Velocity of bullet <br>

<br> = 3 kg. m/s <br> Now, suppose the recoil velocity of gun is v m/s. <br> So, Momentum of gun=Mass

Recoil velocity of gun <br>

v kg m/s <br> According to the law of conservation of momentum : <br> So,

<br> And,

<br> Recoil velocity of gun,v=0.5 m/s