Final Exam Prep Answers To Remember

Question 1

How do you explain why actual velocity after a collision is lower than would be predicted by a perfect conservation of linear momentum equation

Answer 1

Momentum not conserved as external force acts
This is friction from the road

Question 2

Explain what equilibrium is in terms of moments

Answer 2

Sum of moments about any point is 0

Question 3

How do you do the practical with thermistor and resistance varying with temperature?

Answer 3

Immerse the thermistor in water, measure temp with thermometer
Safety glasses in case of splashes of hot water/clamp stand to ensure beaker stable
Plus a detailed point about ensuring eye level with thermometer

Remember to include a detailed point on every method! This could be ensuring no parallax error (eye level) or zero error