physics investigatory project class 11 on friction

Multi grade ratings are in the form xWy (eg. The oil only thins to a particular extent so as to keep the engine sufficiently Under cold conditions, the oil is thin enough to grease the engineĪnd allow for proper ignition and running. These behave as differently rated single grade oils under different temperatureĬonditions. Therefore, multi grade oils are more popular. However, single grade oils cannot withstand the variety of conditions Multiple polymers (multi grade) and are rated accordingly. How it is rated: Engine oils can be made of singular polymers (single grade) or It also cleans, inhibits corrosion, improves sealing, and cools the engine by Sides of the cylinder block, the oil creates a layer that lets them move When the pistons of the engine move back and forth they wear out the The main function is to reduce wear (deterioration due to friction) on moving Motor oil or engine oil is used for lubrication of various internal combustion Why is engine oil used and how does it work? Metre high, 5cm broad cylindrical glass tube Temperature and thereby determine the most effective one for aġ. To compare the viscosity of different engine oils at a given Of the given choices, you must use your knowledge of physics and viscosity toĬhoose the oil most suited for your diesel engine car. You notice that grime has accumulated in yourĮngine and the motor oil has to be replaced for your car to start.

Suddenly your car breaks down and you open theīonnet to see what’s wrong. You are driving your diesel car on the road to Shimla (a hill-station) and it is 25ĭegrees Celsius outside. Physics Investigatory Project on Fluid Mechanicsįluid Mechanics: Viscosity of Engine Oils

Physics investigatory project class 11 on friction