Caroline Chisholm College

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Presentation transcript:

Caroline Chisholm College Physics Explain the concept of escape velocity in terms of the: – gravitational constant – mass and radius of the planet Outline Newton‘s concept of escape velocity (Jacaranda p.27)

Caroline Chisholm College Physics

107000 km/h orbital v relative to sun Discuss the effect of the Earth‘s orbital motion and its rotational motion on the launch of a rocket Caroline Chisholm College Physics The best time of day at best time of year is the 'LAUNCH WINDOW' 107000 km/h orbital v relative to sun 1700 km/h rotational relative to the sun TRIP TO THE MOON

apparent weight = mg + ma apparent weight Caroline Chisholm College Physics Identify why the term ‘g forces’ is used to explain the forces acting on an astronaut during launch apparent weight = mg + ma apparent weight g-force = --------------------------- normal true weight N.B. a ‘6g’ launch may refer to an acceleration of a = (6 x 9.8), giving an apparent weight of 7g ! g-forces weightlessness Australia's Wonderland Jacaranda Figure 2.17

Horizontal rocket burn Analyse the changing acceleration of a rocket during launch in terms of the: – Law of Conservation of Momentum – forces experienced by astronauts Caroline Chisholm College Physics Horizontal rocket burn For a moving (inertial) frame of reference: i.e. total momentum is unchanged Vertical: external force Water Rocket Experiment

Caroline Chisholm College Physics

Caroline Chisholm College Physics

Caroline Chisholm College Physics Identify data sources, gather, analyse and present information on the contribution of one of the following to the development of space exploration: Tsiolkovsky, Oberth, Goddard, Esnault-Pelterie, O‘Neill or von Braun Tsiolkovsky built the first wind tunnel in Russia which enabled him to observe aerodynamic problems. He proposed the use of reaction motors that were powered by liquid fuels. He suggested the use of green plants to provide oxygen to space crew and dispose of carbon dioxide