3.1. Explain (i) what is meant by an inertial frame of reference, and (ii) whether the earth's motion around the sun is

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3 1 Explain I What Is Meant By An Inertial Frame Of Reference And Ii Whether The Earth S Motion Around The Sun Is 1 (67.42 KiB) Viewed 64 times

3.1. Explain (i) what is meant by an inertial frame of reference, and (ii) whether the earth's motion around the sun is an inertial frame of reference or not. [5] 3.2. Why is Newton's first law used to define an inertial frame of reference? [5] 3.3. Newton's second law, and the laws of conservation of momentum and conservation of energy are all invariant under Galilean transformation. (0) Explain what is meant by the term invariant. [3] (ii) The Galilean transformations of classical mechanics are equations that describe a specific event from an inertial coordinate system relative to another inertial coordinate system. Given the equations to be: x = x' + vt ; y = y';z=z';t=ť Page 3 of 6 HPSG031 SEP/OCT EXAMINATION 2020 Show that the acceleration of a moving body is invariant under a Galilean transformation. [7] 3.4. A rocket ship flies at a speed of 0.800c over a man on earth at a time t = 0 seconds. 3.00 seconds later, the man observes an event happening from him at a distance 5.00 m. How far is this event from the astronaut in the rocket ship? What can you say about your answer? [5]