Northwestern Physics Demos                                 Go back to Mechanics
DCS# 1D60.10NWU# M-105        3 A 1
title: Ball Launch Cart
aka: Howitzer & Tunnel

A ball launching device is attached to a Pasco cart.  Attached to the Pasco track is a small flag that interupts a photogate which fires a yellow ball vertically upward.  When properly set up, the ball will return to the firing device, even when moving at a constant speed.
  A drop rod can be attached to show that the ball will fall into the cart.
  A "tunnel" can be constructed of books and/or boxes so that the ball flies over the tunnel and lands back in the cart.

  Where will the ball land when the cart is rolling down an incline?
image of diskball positiontrigger photogate