Question

The ballistic pendulum is a simple device to measure projectile velocity v by observing the maximum angle θ to which the box of sand with embedded projectile swings. What is the velocity of the 60-g bullet fired horizontally in to the suspended sand 20-kg sand bag swings 300 ?​

Answer 1

Answer:

As there is no external force in x-direction, applying conservation of momentum during collision <br>

<br>

…..(i) <br> Applying conservation of mechanical energy after collision <br>

<br> here

is the displacement of center of mass: <br>

....(ii) <br> Form (i) & (ii) <br>