NOTE: We ordered some Ballistic Pendulums a while ago. Unfortunately, some weren’t assembled correctly, and were damaged during shipping.
We replaced the damaged parts but weren’t able to adjust them to work to our satisfaction and thus we won’t sell them.
The pendulum part is the issue – you may be able to get them to work (we hope you can). The projectile launcher part is functional and the experiments associated with that can be carried out.
Free to a good (or any?) home, so long as you pay postage or pick them up.  One per customer.

Useful for demonstrating the conservation of momentum with a spring gun, steel ball, pendulum block and angular scale. Used to calculate the projectile’s initial velocity and post-collision kinetic energy.
Dimensions (approx.): 260mm (L) x 190mm (W) x 430mm (H); 1.8kg.

Features:
Adjustable feet / leveling screw.
Adjustable height of pendulum bob.
Spirit level mounted on base to line up the perfect shot.
Accessories:
25mm diameter steel ball

NO RETURNS.