PRACTICAL INVESTIGATION - OCR Physics A-LEVEL thermo PROJECT
1. I was very confused when I first found out that the normal reaction of a slope on an object can have a greater magnitude than the actual weight of the object, provided it is moving in centripetal motion. Basic principles of circular motion shown in the document below explain why...
This also means that you resolve with different triangles for a static object on a slope (Normal reaction can never ever be greater than weight with no external force) compared to an object in circular motion on a banked road.
This also means that you resolve with different triangles for a static object on a slope (Normal reaction can never ever be greater than weight with no external force) compared to an object in circular motion on a banked road.
2. During AS I found it difficult to visualize the maths that occurs when one object overtakes another that starts motion in ahead of it. Obviously this is possible, but the way I used to see it was that in a given time, the object that starts behind will travel a distance of x closer to the object in front but the the object in front would have traveled a distance of b away. I didn't know which numbers to use to find the time when they actually overtake.
What complicated issues further was that some mechanics questions involved an object in front accelerating and the object behind travelling at a constant speed, yet the object behind will still eventually overtake.
To see how this is possible I derived a few solid methods that will always work in such questions. My solutions and explanations are shown below...
What complicated issues further was that some mechanics questions involved an object in front accelerating and the object behind travelling at a constant speed, yet the object behind will still eventually overtake.
To see how this is possible I derived a few solid methods that will always work in such questions. My solutions and explanations are shown below...