The motion of vehicles on landThe structure and principles of operation of vehicles without engines. Sprocket and hubare two flat wheels with a row of teeth used to turn the bicycle wheels and thus moving it.The sprocket and hub are connected are connected by an iron chain.The structure and principle of operation of vehicles with enginesAn engine is a machine that converts chemical energy stored in fuel into kinetic energy to produce motion.There are three types of internal combustion engines,such as:Four stroke petrol engineFour stroke diesel engineTwo stroke petrol engine The four stroke petrol engineFour stroke petrol engines four cylinders.nlet valve,!"haust valve and a spark plug.Similarities and differences between the four strokes petrol engine and the four stroke dieselnternal combustion engine.Four stages.#onvert chemicals energy to heat kinetic energy.differences between the four stroke petrol engines and the four stroke diesel engine The two stroke petrol engine.There is no value in the two stroke petrol engine .the structure and operation of a two stroke petrol engine.similarities and differences between the four stroke petrol engine and the two stroke petrol engine.nternal combustion engines.$etrol combustion fuel.Spark plugs.#onvert chemical energy to heat kinetic energy.differences between the four stroke petrol engine and the two stroke petrol engine