A 150-G Bullet Is Fired into a 1,500-G Block of Wood

Multiple Choice

A 15.0-g bullet is fired into a 1,500-g block of wood which is suspended as a ballistic pendulum.The combined mass swings up to a height of 8.50 cm.What was the kinetic energy of the combined mass immediately after the collision?

A) 1.262 × 10³ J
B) 1.25 J
C) 0.012 J
D) 1.262 J
E) ​0.129 J