Year 12 Physics Ark Globe Academy Remote Learning Pack Phase V Monday 22 June- Friday 10 July Page 1 of 44 Year 12 Physics Sessio Title Work to be Resource Outcome On-Line n completed provided Support 1 Uniform - Read 21.1 Oscillations Textbook Complete and mark: - Watch video 3.01 and radial while taking notes. Page(s): Summary questions and 3.02. Takes notes ,which go fields - Complete and mark 338-339 21.1 into your folder. the summary questions 2 Newton’s - Read 21.3 Newton’s Textbook Complete and mark: - Watch video 3.03 law of law of gravitation while Page(s): Summary questions Takes notes ,which go into your folder. gravitatio taking take notes. 343-345 21.3 n, inverse - Complete and mark square the summary questions. Lesson: law 1 - DO NOW Live lesson: 2 - Checking for Uniform and radial Understanding fields Question(s) Live lesson: 3 - Application Newton’s law of Question(s) gravitation and adding fields 3 Gravitatio - Read 21.2 Textbook Complete and mark: - Watch video 3.04 nal Gravitational potential Page(s): Summary questions and 3.05. Takes notes ,which go potential take notes. 340 – 342 21.2 into your folder. 1 - Complete and mark the summary questions 4 Gravitatio - Complete the online Complete online - Diagnostic on nal Gravitational fields diagnostic MS forms potential diagnostic part 1 2 Lesson: Live lesson: 1 - DO NOW Gravitational potential, 2 - Checking for potential difference and Understanding escape velocity Question(s) 3 - Application Question(s) 5 Gravitatio - Read 21.4 Planetary Textbook Complete and mark: - Watch video 3.06 nal fields while taking Page(s): Summary questions Takes notes ,which go into your folder. potential notes. 346 - 350 21.4 - Complete and mark the summary questions 6 Orbits - Read 21.5 Satellite Textbook Complete and mark: - Watch video 3.07 motion Page(s): Summary questions & 3.08 Takes notes ,which go - Complete and mark 351 - 353 21.5 into your folder. the summary questions 7 Orbits 2 Live lesson: Lesson: - Watch video 2.09 Gravitational potential 1 - DO NOW Takes notes ,which go into your folder. graphs and gradient 2 - Checking for Understanding Live lesson: Question(s) Orbits 3 - Application Question(s) Page 2 of 44 8 Gravitatio - Complete the online Work pack V Complete online - Diagnostic on nal field Gravitational field Pages(s) 4-12 diagnostic MS forms applied 1 diagnostic part 2 - Complete and mark Complete all MCQ the MCQ exam questions 1 - 23 9 Gravitatio - Complete and mark Work pack V Complete all nal fields the exam questions 24- Pages(s) 12-27 calculation, graphs applied 2 35 and writing questions. Live lesson: Lesson: Gravitational fields 1 - DO NOW applied 2 - Checking for Understanding Question(s) 3 - Application Question(s) 10 Gravitatio - Complete the exam Textbook Complete exam Get head start y nal field questions on pages 354 Page(s): questions from old watching summary - 357 354- 357 spec videos 4.01 – - Mark answers 4.03 NOTE: After completing each session, check all task/PPQ answers using answers at the back. Page 3 of 44 Session 8 - MCQ Q1. The distance between the Sun and the Earth is 1.5 × 1011 m What is the gravitational force exerted on the Sun by the Earth? A 3.5 × 1022 N B 1.7 × 1026 N C 5.3 × 1033 N D 8.9 × 1050 N (Total 1 mark) Q2. A planet has a radius half of the Earth’s radius and a mass a quarter of the Earth’s mass. What is the approximate gravitational field strength on the surface of the planet? A 1.6 N kg–1 B 5.0 N kg–1 C 10 N kg–1 D 20 N kg–1 (Total 1 mark) Q3. Which one of the following could be a unit of gravitational potential? A N B J C N kg–1 D J kg–1 (Total 1 mark) Q4. A mass of 5 kg is moved in a gravitational field from a point X at which the gravitational potential is –20 J kg–1 to a point Y where it is –10 J kg–1. The change in potential energy of Page 4 of 44 the mass, in J, between X and Y is A –50 B –10 C +10 D +50 (Total 1 mark) Q5. The diagram shows two points, P and Q, at distances r and 2r from the centre of a planet. The gravitational potential at P is −16 kJ kg−1. What is the work done on a 10 kg mass when it is taken from P to Q? A – 120 kJ B – 80 kJ C + 80 kJ D + 120 kJ (Total 1 mark) Q6. A projectile moves in a gravitational field. Which one of the following is a correct statement for the gravitational force acting on the projectile? A The force is in the direction of the field. B The force is in the opposite direction to that of the field. C The force is at right angles to the field. D The force is at an angle between 0° and 90° to the field. (Total 1 mark) Q7. The diagram shows two positions, X and Y, at different heights on the surface of the Earth. Page 5 of 44 Which line, A to D, in the table gives correct comparisons at X and Y for gravitational potential and angular velocity? gravitational potential at X angular velocity at X compared with Y compared with Y A greater greater B greater same C greater smaller D same same (Total 1 mark) Q8. The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kgࢤ 1 . Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and P? A 0.80 N kgࢤ 1 B 1.25 N kgࢤ 1 C 8.0 N kgࢤ 1 D 80 N kgࢤ 1 (Total 1 mark) Q9. The graph shows how the gravitational potential, V, varies with the distance, r , from the centre of the Earth. Page 6 of 44 What does the gradient of the graph at any point represent? A the magnitude of the gravitational field strength at that point B the magnitude of the gravitational constant C the mass of the Earth D the potential energy at the point where the gradient is measured (Total 1 mark) Q10. What is the angular speed of a satellite in a geo-synchronous orbit around the Earth? A 7.3 × 10–5 rad s–1 B 2.6 × 10–1 rad s–1 C 24 rad s–1 D 5.0 × 106 rad s–1 (Total 1 mark) Q11. An artificial satellite of mass m is in a stable circular orbit of radius r around a planet of mass M. Which one of the following expressions gives the speed of the satellite? G is the universal gravitational constant. A B Page 7 of 44 C D (Total 1 mark) Q12. Satellites N and F have the same mass and move in circular orbits about the same planet. N is the nearer satellite and F is the more distant. Which one of the following is smaller for N than for F? A gravitational force on the satellite B speed C kinetic energy D time for one orbit (Total 1 mark) Q13. Which one of the following has different units to the other three? A gravitational potential B gravitational field strength C force per unit mass D gravitational potential gradient (Total 1 mark) Q14. As a comet orbits the Sun the distance between the comet and the Sun continually changes. As the comet moves towards the Sun this distance reaches a minimum value. Which one of the following statements is incorrect as the comet approaches this minimum distance? A The potential energy of the comet increases. B The gravitational force acting on the comet increases. C The direction of the gravitational force acting on the comet changes. D The kinetic energy of the comet increases. (Total 1 mark) Q15. When two similar spherical objects of radius R are touching, the gravitational force of Page 8 of 44 attraction between them is F. When the gravitational force between them is F/4, the distance between the surfaces of the spheres is A R B 2R C 4R D 6R (Total 1 mark) Q16. A satellite is in orbit at a height h above the surface of a planet of mass M and radius R. What is the velocity of the satellite? A B C D (Total 1 mark) Q17. The diagram shows two point masses each of mass m separated by a distance 2r. What is the value of the gravitational field strength at the mid-point, P, between the two masses? A B C Page 9 of 44 D zero (Total 1 mark) Q18. Which one of the following graphs correctly shows the relationship between the gravitational force, F, between two masses and the distance, r, between them? A B C D (Total 1 mark) Q19. Masses of M and 2M exert a gravitational force F on each other when the distance between their centres is r. What is the gravitational force between masses of 2M and 4M when the distance between their centres is 4r? A 0.25 F B 0.50 F C 0.75 F D 1.00 F (Total 1 mark) Q20. Two stars of mass M and 4M are at a distance d between their centres. Page 10 of 44 The resultant gravitational field strength is zero along the line between their centres at a distance y from the centre of the star of mass M.