A 65.00 g projectile is shot at the 350.0 g holder of a ballistic pendulum. After the projectile strikes the holder and the two move forward and up, they reach a maximum height of 0.2600 m. What was the initial velocity of the projectile?

9.898 m/s
10.19 m/s
12.16 m/s
14.41 m/s

Question

A 65.00 g projectile is shot at the 350.0 g holder of a ballistic pendulum. After the projectile strikes the holder and the two move forward and up, they reach a maximum height of 0.2600 m. What was the initial velocity of the projectile?

9.898 m/s
10.19 m/s
12.16 m/s
14.41 m/s

jfraser · Answer

use conservation of energy.

the total PE of the pendulum and projectile at the end must equal the total KE of the projectile before the collision