A bullet of mass 25 g is fired horizontally into a ballistic pendulum of mass 5.0 kg and gets embedded in it (figure9.E14). If the center of the pendulum rises by a distance of 10 cm, find the speed of the bullet.

Question

Philoid · Accepted Answer

Mass of bullet is m = 25 g = 0.025 kg,

Mass of pendulum is M = 5 kg,

Vertical displacement is h = 10 cm = 0.1 m,

Let it strike pendulum with velocity u.

Let final velocity be v

Using conservation of energy,

So, the bullet strikes pendulum with velocity u = 280 m/s.