Question

please solve this for me it's of physics​

Answer 1

solve answers is given in above pic

Answer 2

Given:-

• Mass of bullet is 15g.
• Velocity of bullet is 120m/s.
• Recoil velocity of gun is 1m/s.

To Find:-

• The mass of the gun.

Concept Used:-

We will make use of law of conservation of momentum which is mathematically stated as :

$\large{\underline{\boxed{\red{\tt{\dag m_1v_1+m_2v_2=m_1u_1+m_2u_2.}}}}}$

[ For soluⁿ refer to attachment : ]

More to know :-

The three equⁿs of motion are

• v = u + at.
• s = ut + ½at².
• 2as = v² - u².
• $\sf{S_n}$ = u + ½a[2n-1] .

➥ When a body is projected with initial velocity u then the maximum height achieved is : u²/2g .

➥ When a body is dropped from a certain height then the velocity attained after covering a distance of h is : √2gh .

➥ Time of ascent is given by : √[2h/g]

➥ Time of a cent is equal to time of descent when air friction is neglected and equals to : u/g .

➥ Momentum of a body is given by product of mass and velocity : p = mv .