Question

(｀・ω・´)

求這題～
答案為為 a .31cm
b.866J
c.1.15J

ping. What was the initial speed of the bullet?
8.43 A Ballistic Pendulum. A 12.0 g rifle bullet is fired with a
speed of 380 m/s into a ballistic pendulum with mass 9.00 kg, suspended
from a cord 70.0 cm long (see Example 8.8 in Section 8.3). Compute
(a) the vertical height through which the pendulum rises, (b) the initial
kinetic energy of the bullet, and (c) the kinetic energy of the bullet and
pendulum immediately after the bullet becomes embedded in the wood.
150 kg block is attached
A