A 12.0-g bullet is fired into a 1 100-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?

Question

A 12.0-g  bullet is fired into a 1 100-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?

oobleck · Accepted Answer

KE on impact = PE after = (0.1 + 0.012) * 0.085 * 9.81

Anonymous · Answer

1.44