P3 Revision Questions

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1 P3 Revision Questions Part 1

2 Question 1 What is a kilometre?

3 Answer metres

4 Question 2 What is meant by an average speed?

5 Answer 2 The average distance covered per second

6 Question 3 How do speed cameras work?

7 Answer 3 They take two photos, the time between the photos is known, the lines on the road can measure the distance the car has travelled

8 Question 4 What does a sloped straight line mean on a distance time graph?

9 Answer 4 Moving at constant speed

10 Question 5 What does a horizontal line mean on a distance time graph?

11 Answer 5 At rest (speed = 0m/s)

12 Question 6 How can you calculate the speed from a distance time graph?

13 Answer 6 Measure the gradient

14 Question 7 How can you tell if one part of a journey on a distance-time graph is greater than another

15 Answer 7 The line is steeper with a greater speed

16 Question 8 What does a curved line mean on a distancetime graph?

17 Answer 8 Non-uniform acceleration

18 Question 9 What is the equation to calculate speed?

19 Answer 9 Speed= distance/time

20 Question 10 How do you calculate the gradient of a line on a graph?

21 Answer 10 Change in y axis / change in x axis

22 Question 11 What does a horizontal line mean on a speed time graph?

23 Answer 11 Constant speed

24 Question 12 How can you tell an object is not moving from a speed-time graph?

25 Answer 12 Line is at 0m/s

26 Question 13 What does a straight positive line represent on a speed time graph?

27 Answer 13 Constant acceleration

28 Question 14 What does a straight negative line represent on a speed time graph?

29 Answer 14 Constant deceleration

30 Question 15 How could you calculate the distance travelled on a speed time graph?

31 Answer 15 Calculate the area underneath the graph

32 Question 16 How could you calculate the acceleration from a speed time graph?

33 Answer 16 Measure the gradient

34 Question 17 What is acceleration? What is it measured in?

35 Answer 17 Rate of change of speed. m/s 2

36 Question 18 What is speed? What is it measured in?

37 Answer 18 Rate of change of distance/ how fast something is moving. m/s

38 Question 19 What is deceleration?

39 Answer 19 When an object s speed decreases

40 Question 20 How can you tell if an object is accelerating more on a speed time graph?

41 Answer 20 It has a positive sloped line

42 Question 21 What is velocity? What is it measured in?

43 Answer 21 Speed in a certain direction. m/s

44 Question 22 What three things could change if an object is accelerating?

45 Answer 22 Speed, direction, speed and direction

46 Question 23 What three things can a force change?

47 Answer 23 Speed, direction, shape

48 Question 24 What is the equation for force? What is force measured in?

49 Answer 24 Force = mass x acceleration Newtons

50 Question 25 What is mass? What is it measured in?

51 Answer 25 Amount of matter in an object. kg

52 Question 26 What is the thinking distance?

53 Answer 26 The distance travelled whilst the driver reacts before braking

54 Question 27 What is the braking distance?

55 Answer 27 The distance travelled whilst a car is braking

56 Question 28 What is the total stopping distance?

57 Answer 28 Braking distance + thinking distance

58 Question 29 What happens if the forces acting on an object are balanced?

59 Answer 29 They are at rest or moving at constant speed

60 Question 30 What happens if the forces acting on an object are unbalanced?

61 Answer 30 They accelerate or decelerate

62 Question 31 Why is it important we know the total stopping distances of cars?

63 Answer 31 So we know what a safe distance is to travel behind other cars

64 Question 32 What 4 things can increase a persons thinking distance?

65 Answer 32 Tiredness, drugs/ alcohol, distractions, speed

66 Question 33 Name 4 thing that can increase braking distance

67 Answer 33 Road conditions, brakes, tyre condition, greater speed

68 Question 34 What are the implications of stopping distances in road safety?

69 Answer 34 Speed limits, road conditions

70 Question 35 What is friction?

71 Answer 35 A force that acts against the movement of one surface against the other

72 Question 36 What is the relationship between force, mass and acceleration?

73 Answer 36 Force = mass x acceleration

74 Question 37 What happens to the thinking distance if the speed of a car doubles?

75 Answer 37 It doubles

76 Question 38 What happens to the braking distance if the speed of a car doubles?

77 Answer 38 It quadruples

78 Question 39 What is meant by work done? What is it measured in?

79 Answer 39 The amount of energy transferred by a force acting on an object. Joules

80 Question 40 Give an example of work being done

81 Answer 40 Brakes on a car, pulling a sledge

82 Question 41 What is the equation for work done?

83 Answer 41 Work done = Force x distance

84 Question 42 What is power? What is it measured in?

85 Answer 42 The rate that work is done, measured in watts

86 Question 43 How does a car s engine size and power rating relate to its fuel consumption?

87 Answer 43 More powerful and larger the car, greater the fuel consumption

88 Question 44 What is weight?

89 Answer 44 The force caused by the acceleration due to gravity

90 Question 45 How do you calculate weight?

91 Answer 45 Weight = mass x gravitational strength

92 Question 46 What is the equation for power?

93 Answer 46 Power = work done/ time

94 Question 47 What is kinetic energy?

95 Answer 47 The amount of energy an object has because its moving

96 Question 48 What are 5 different ways to power a car?

97 Answer 48 Biofuel, solar, battery, diesel, petrol

98 Question 49 What 4 things can affect a car s fuel consumption and top speed?

99 Answer 49 Weight, shape, driving with windows open, deflectors

100 Question 50 Why does increasing speed increase braking distance?

101 Answer 50 Car has more kinetic energy to lose

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