Lab Activity
ballistic pendulum
This lab activity is to use a ballistic pendulum.
general objectives
 determine the speed of a projectile
 use conservation of energy and momentum
concepts and terms
 conservation of energy
 gravitational potential energy
 conservation of momentum
 inelastic collision
activities
 presentation
 obtain experimental data and analyse them
The velocity of a ball impacting a ballistic pendulum with an elastic collision is given by:
v^{2} = 2  M^{2}  gR(1 − cos θ) 
m^{2} 
where M is the mass of the pendulum and ball combined, m is the mass of the ball, R is the distance from the pivot to the center of mass of the pendulum and ball, and θ is the angle from the vertical reached by the pendulum when the ball collides with it.
Activity Report due at the next class period—Wednesday
revised 4 Oct 11
