Friction on the ramp might slow the ball as it rolls down the hill. Discuss the impact of this as a systematic error - in particular, what would be the impact on g? Note that there's an important subtlety here to discuss: friction before the photogate and friction after the photogate act differently as systemic errors. How and why? (10pt) Launch angle: Although these setups are designed to launch the ball horizontally, they may not do so perfectly. They may, in fact, launch the ball at a slight upwards or downwards angle. Discuss the impacts of this systematic error: how would the range depend on the angle? (Does the effect depend on h, g, and/or v)