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CfE Dynamics and Space

CfE Dynamics and Space. QUESTION 1. State the difference between average speed and instantaneous speed. QUESTION 2. Why is instantaneous speed measured electronically rather than manually?. QUESTION 3.

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CfE Dynamics and Space

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  1. CfE Dynamics and Space

  2. QUESTION 1 State the difference between average speed and instantaneous speed.

  3. QUESTION 2 Why is instantaneous speed measured electronically rather than manually?

  4. QUESTION 3 Calculate the average speed in kmh-1and in ms-1 of a car if it travels 36km in 45 minutes.

  5. QUESTION 4 Describe in detail how you would measure the instantaneous speed of a trolley down a ramp. (Remember to state all of the equipment required!!!)

  6. QUESTION 5 Calculate the speed of the trolley at pointQ and the average speedbetween P andQ below from the information given.

  7. QUESTION 6 Define the term ‘acceleration’ and list all of the quantities and units involved in the acceleration equation.

  8. QUESTION 7 Calculate a cars acceleration if its speed increases from 14ms-1 to 22ms-1 in 32 seconds.

  9. QUESTION 8 A car travelling in a straight line decelerates from 20ms-1 to 12ms-1 in 4 seconds. a) Sketch this information on a Velocity-time graph. Calculate or find: b) Acceleration of the car in the 4s c) Displacement of the car in the 4s.

  10. QUESTION 9 The graph shows how the velocity of a ball varies over 4 seconds. Calculate or find: a) Acceleration of the ball over the 4s b) Displacement of the ball over the 4s.

  11. QUESTION 10 Calculate or find for the object below: a) Acceleration over the first 60s. b) Distance travelled over the first 80s. c) Average speed over the first 80s.

  12. QUESTION 11 A cyclist approaches traffic lights at 7ms-1. She applies the brakes 4s after seeing the lights turning red and comes to rest in a further 2s. a) Sketch a speed-time graph of the cyclist over the 6s. b) Calculate the distance travelled and the average speed of the cyclist over the 6s.

  13. QUESTION 12 State the unit that force is measured in and list three changes that they can make to an object.

  14. QUESTION 13 State the name of the instrument used to measure force and what is it also sometimes known as?

  15. QUESTION 14 State the definitions of the terms ‘mass’ and ‘weight’ and the units that they are measured in.

  16. QUESTION 15 Calculate the weight of a Physics teacher of mass 95kg.

  17. QUESTION 16 Calculate the mass of an truck that has a weight of 30,000N.

  18. QUESTION 17 State the definition of the term ‘gravitational field strength’.

  19. QUESTION 18 How would your mass and your weight compare on the moon and on different planets?

  20. QUESTION 19 How would you describe the direction in which any frictional force would act?

  21. QUESTION 20 a) State the forces acting on you when you open a parachute during a jump. b) Compare these forces in a) when you reach a terminal velocity.

  22. QUESTION 21 State and compare the horizontal forces acting on a car when it is travelling with: a) constant speed b) constant acceleration c) constant deceleration.

  23. QUESTION 22 State Newton’s three laws of motion and list the equation and units involved with the first two laws.

  24. QUESTION 23 What is meant by the term ‘work done’ and which unit is it measured in?

  25. QUESTION 24 A Larbert High pupil pushes the family shopping trolley around the supermarket. A force of 20N is applied over a distance of 600m on the weekly shop. Calculate the work done on the trolley.

  26. QUESTION 25 The 5kg block below is travelling at a constant speed along the surface. What is the force of friction acting on the block?

  27. QUESTION 26 Which block has the largest resultant force acting on it?

  28. QUESTION 27 An unbalanced force of 1N will make a

  29. QUESTION 28 Near the Earths surface, a mass of 6kg is falling with a constant velocity. Assuming g =10Nkg-1, the air resistance and the unbalanced force acting on the mass are:

  30. QUESTION 29 A block of mass 6kg is pulled along a horizontal bench as shown. Calculate the force of friction between the block and the bench if it accelerates at 4ms-2.

  31. QUESTION 30 Calculate the mass of the box below if it accelerates at 1.6ms-2.

  32. QUESTION 31 A child on a sledge down a snowy hill slows down at B and comes to a halt at C. Explain this motion in terms of forces.

  33. QUESTION 32 An aircraft and passengers with a total mass 50,000kg is travelling horizontally at a constant speed. a) Calculate the total weight on the aircraft b) State the magnitude of the lift force on the wings.

  34. QUESTION 33 A hot air balloon of mass 400kg rises from the ground. The speed-time graph below shows its motion during the first 100s of its flight. Calculate its total upward force during the first 60s.

  35. QUESTION 34 A ball rolls down a runway and leaves it at point R and takes 0.6s to travel from R to T. Calculate the distance from S to T.

  36. QUESTION 35 A ball is thrown horizontally from a cliff as shown below. If air resistance is considered negligible, then which of the following statements are true?

  37. QUESTION 36 Two identical balls X and Y are projected horizontally from the edge of a cliff and take different paths as shown below. Which of the following statements is/are true?

  38. QUESTION 37 A Mars Rover vehicle launches a probe horizontally at 30ms-1 and takes 6s to reach the bottom of a large crater. Calculate or find: a) Horizontal distance travelled by the probe b) Vertical distance travelled by the probe. (g on Mars = 3.7Nkg-1)

  39. QUESTION 38 A package is released from a helicopter flying horizontally at 40ms-1and takes 3s to reach the ground. Calculate or find: a) Horizontal speed as it hits the ground. b) Vertical speed as it hits the ground. c) Horizontal distance travelled. d) Vertical distance travelled.

  40. QUESTION 39

  41. QUESTION 40 A satellite navigation system receives radio signals transmitted by satellites in orbit around the Earth. Complete the passage below.

  42. QUESTION 41 An LED torch produces a beam of light. The LED is positioned at the focus of the torch reflector. Complete the diagram by drawing light rays to show how the beam of light is produced.

  43. QUESTION 42 When microwaves reach a satellite ground station they are received by a curved reflector. Use a labelled diagram to explain how a curved reflector is used.

  44. QUESTION 43 A geostationary satellite link up was set up for the US presidential election between Washington and London, with television pictures transmitted by microwaves. a) What is a geostationary satellite? b) Calculate the wavelength of the microwaves if they have a frequency of 12GHz.

  45. QUESTION 44 State the definitions of: a) a scalar quantity b) a vector quantity.

  46. QUESTION 45 Which of the following groups contains two vector quantities and one scalar quantity?

  47. QUESTION 46 During training an athlete sprints 40m East followed by 60m West. Calculate or find: a) Distance travelled b) Displacement.

  48. QUESTION 47 Two forces each of 7N, act on an object O as shown below. Calculate the resultant of these two forces. (Remember M & D’s!!!)

  49. QUESTION 48 Four tug boats apply forces to an oil rig in the directions shown below. Calculate the resultant force on the oil rig. (Remember M & D’s!!!)

  50. QUESTION 49 A yacht follows the course shown below during a race. The race starts and finishes at point X. Calculate or find: a) The distance travelled from the start to Z. b) The displacement from the start to Z.

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