Effects of Forces · CAPE Physics Unit 1

94 past-paper questions on Effects of Forces, part of Mechanics, from every CAPE Physics Unit 1 paper on Quelpr.

1. Q21 mark · multiple choice· CAPE Physics Unit 1 · 2007 · Paper 1Coplanar forces with magnitudes 7\text{ N}, 24\text{ N} and X are in equilibrium. What is the value of X?
2. Q91 mark · multiple choice· CAPE Physics Unit 1 · 2007 · Paper 1Which velocity-time graph BEST represents the motion of a falling spherical body from rest through glycerine?
3. Q101 mark · multiple choice· CAPE Physics Unit 1 · 2007 · Paper 1Two parallel forces act on a rigid body as shown in the diagram above. The size of the torque on the body by these forces is
4. Q111 mark · multiple choice· CAPE Physics Unit 1 · 2007 · Paper 1A parachutist of mass 80\text{ kg} descends vertically at a constant velocity of 3.0\text{ m s}^{-1}. What is the resultant downward force acting on her?
5. Q51 mark · multiple choice· CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1A wooden block of mass 0.80\text{ kg} is being pulled along a rough horizontal surface with or force of 20\text{ N} as shown above. The block experiences on acceleration of 5\text{ m s}^{-2}. What is magnitude of…
6. Q101 mark · multiple choice· CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1Two rocks are spun around in circular paths at the ends of strings of equal length. What quantity MUST be the same for both rocks if the tension in the strings are equal?
7. Q111 mark · multiple choice· CAPE Physics Unit 1 · 2008 (Rest of Region) · Paper 1A hot-air balloon moving upwards has a total weight of 200\text{ N} and a volume of 20\text{ m}^3. Assuming the density of the air outside the balloon is 1.2\text{ kg m}^{-3}, the NET upward force on the balloon…
8. Q141 mark · multiple choice· CAPE Physics Unit 1 · 2008 (Rest of Region) · Paper 1Which of the following graphs represents the velocity-time graph of a brass ball-bearing when released in a column of glycerine?
9. Q101 mark · multiple choice· CAPE Physics Unit 1 · 2008 (T&T) · Paper 1An object is floating in a fluid. Which statement is NOT true?
10. Q141 mark · multiple choice· CAPE Physics Unit 1 · 2008 (T&T) · Paper 1For a parachutist falling at terminal velocity
11. Q11 mark · multiple choice· CAPE Physics Unit 1 · 2009 · Paper 1A rubber ball of weight, W, is suspended from a support and is being displaced laterally at an angle, \theta^\circ, from the vertical by a wind of constant force (H). The ball is in equilibrium and the tension in…
12. Q121 mark · multiple choice· CAPE Physics Unit 1 · 2009 · Paper 1The plank shown below is in equilibrium when acted on by the forces shown. Which statements is/are true? I. T + P = W II. P(x+y) = Wy III. Px = Ty
13. Q71 mark · multiple choice· CAPE Physics Unit 1 · 2010 · Paper 1Two identical masses are attached by a string, which passes over a frictionless pulley. All the graphs below are drawn to the same scale. Which pair of graphs below represents the acceleration of Body P and the…
14. Q101 mark · multiple choice· CAPE Physics Unit 1 · 2010 · Paper 1A man of mass 50\text{ kg} stands on a bathroom scale (balance) in an elevator. If the elevator accelerates upwards to 2\text{ m s}^{-2}, what is the reading on the scale?
15. Q121 mark · multiple choice· CAPE Physics Unit 1 · 2010 · Paper 1A man with a parachute jumps from a plane. He opens his parachute after 2.5 seconds. Which of the graphs below BEST represents how his vertical acceleration a, could vary with time t, during the first 6 seconds of…
16. Q11 mark · multiple choice· CAPE Physics Unit 1 · 2011 · Paper 1A rubber ball of weight, W, is suspended from a support and is being displaced laterally at an angle, \theta^\circ, from the vertical by a wind of constant force, H. The ball is in equilibrium, and the tension in the…
17. Q101 mark · multiple choice· CAPE Physics Unit 1 · 2011 · Paper 1Which of the following statements is NOT true about an object floating in a fluid?
18. Q121 mark · multiple choice· CAPE Physics Unit 1 · 2011 · Paper 1Item 12 refers to the following diagram which shows a plank in equilibrium when acted on by the forces P, T and W. From the diagram above which of the following statements is/are true? I. T + P = W II.…
19. Q121 mark · multiple choice· CAPE Physics Unit 1 · 2012 · Paper 1When a small steel ball bearing falls through glycerine it quickly reaches a terminal velocity. This happens because the
20. Q11 mark · multiple choice· CAPE Physics Unit 1 · 2013 · Paper 1A rubber ball of weight, W, is suspended from a support and is being displaced laterally at an angle, \theta^\circ, from the vertical by a wind of constant force, H. The ball is in equilibrium and the tension in…
21. Q21 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1A rubber ball of weight, W, is suspended from a support and is being displaced laterally at an angle, \theta^\circ, from the vertical by a wind of constant force, H. The ball is in equilibrium and the tension in…
22. Q121 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1Item 12 refers to the following diagram which shows a plank in equilibrium when acted on by the forces P, T and W. From the diagram above, which of the following statements would be true? I. T + P = W II.…
23. Q151 mark · multiple choice· CAPE Physics Unit 1 · 2014 · Paper 1Which of the following graphs of kinetic energy against time BEST represents a body falling from rest and eventually reaching a terminal velocity?
24. Q121 mark · multiple choice· CAPE Physics Unit 1 · 2015 · Paper 1Item 12 refers to the following graph which shows the velocity of a small ball bearing travelling through a measuring cylinder of glycerine. The points labelled X and Y represent respectively
25. Q151 mark · multiple choice· CAPE Physics Unit 1 · 2016 · Paper 1Which of the following graphs of kinetic energy against time BEST represents a body falling from rest and eventually reaching a terminal velocity?
26. Q101 mark · multiple choice· CAPE Physics Unit 1 · 2017 · Paper 1Item 10 refers to the following diagram of a small ball bearing falling from rest in a viscous liquid. The forces acting on the ball bearing are its weight, W, viscous drag, F, and upthrust, U. When terminal…
27. Q111 mark · multiple choice· CAPE Physics Unit 1 · 2017 · Paper 1Item 11 refers to the following diagram which shows a plank in equilibrium when acted on by the forces P, T and W. From the diagram above, which of the following statements are true? I. T + P = W II.…
28. 1(c)2 marks· CAPE Physics Unit 1 · May/June 2021 · Paper 2Identify the two major forces acting on the parachutist during the intervals 20–40 s and 45–60 s, and state the relationship between these forces.
29. 1(d)(iii)2 marks· CAPE Physics Unit 1 · May/June 2021 · Paper 2Calculate the normal reaction force acting on the car.
30. 1(a)(i)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Define the term 'drag force'.
31. 1(a)(ii)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Define the term 'terminal velocity'.
32. 1(b)(i)3 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2State the meaning of EACH term on the right-hand side of the equation F_D = 6 π r η v.
33. 1(b)(ii)1 mark· CAPE Physics Unit 1 · May/June 2022 · Paper 2State ONE condition under which the equation F_D = 6 π r η v applies for the motion of a spherical object.
34. 1(c)(ii)3 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Explain the shape of the graph plotted in (c)(i).
35. 1(c)(iii)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Use the graph in (c)(i) to determine the terminal velocity, v_t, of the metal sphere, in m s⁻¹.
36. 1(d)(ii)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Given that m = 5 × 10⁻³ kg and r = 1 × 10⁻³ m, determine the value of k for glycerin at 30 °C.
37. 1(e)(i)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Explain how the terminal velocity will be affected if a sphere of the same mass but twice the radius is used.
38. 1(e)(ii)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Explain how the terminal velocity will be affected if a sphere of a different metal is used.
39. 1(f)2 marks· CAPE Physics Unit 1 · May/June 2022 · Paper 2Explain why the upthrust is neglected in the calculation of terminal velocity in this experiment.
40. 1(f)2 marks· CAPE Physics Unit 1 · May/June 2023 · Paper 2State, in words, Newton's law of universal gravitation.
41. 1(d)(ii)3 marks· CAPE Physics Unit 1 · May/June 2025 · Paper 2Sketch a diagram to show ALL the forces acting on the object.
42. 1(d)(iii)2 marks· CAPE Physics Unit 1 · May/June 2025 · Paper 2Sketch a diagram to show ALL the forces acting on the inclined plane.
43. 1(d)(i)2 marks· CAPE Physics Unit 1 · May/June 2026 · Paper 2State TWO similarities between friction and drag.
44. 1(d)(ii)2 marks· CAPE Physics Unit 1 · May/June 2026 · Paper 2Outline ONE difference between friction and drag.
45. 1(a)1 mark· Physics · Unit 1 Q1 1(a)Table 1 shows the data collected in a terminal velocity experiment. A small lead sphere of mass m and radius r was timed as it fell through glycerine contained in a long tube at 30 °C.
46. 1(a)(i)1 mark· Physics · Unit 1 Q1 1(a)(i)Next to Figure 1 draw a free body diagram to show the forces acting on the skydiver.
47. 1(a)(ii)2 marks· Physics · Unit 1 Q1 1(a)(ii)Hence show that when her downward acceleration is a, the equation of motion for the skydiver can be written as g - a = (b/m)v^n.
48. 1(a)(ii)2 marks· Physics · Unit 1 Q1 1(a)(ii)Explain the shape of the graph and use it to identify the terminal velocity, Vₜ, of the sphere.
49. 1(b)1 mark· Physics · Unit 1 Q1 1(b)The terminal velocity, Vₜ, of the lead sphere, is given by Vₜ = mg / (6πkr) where k is a temperature-dependent constant that determines the resistance to motion in the fluid.
50. 1(b)(ii)2 marks· Physics · Unit 1 Q1 1(b)(ii)Given that m = 5 x 10⁻³ kg, and r = 1 x 10⁻³ m, determine the value of k for glycerine at 30 °C.
51. 1(b)(iii)1 mark· Physics · Unit 1 Q1 1(b)(iii)Explain how the terminal velocity will be affected if a sphere of the same mass but twice the radius is used.
52. 1(b)(iv)3 marks· Physics · Unit 1 Q1 1(b)(iv)Calculate the terminal velocity of a skydiver with a mass of 78.5 kg, given that b = 0.251 kg m⁻¹.
53. 1(b)(v)2 marks· Physics · Unit 1 Q1 1(b)(v)The maximum potential energy calculated in (b)(iv) assumes that air resistance is negligible. Explain how this result would be affected if air resistance was significant.
54. 1(c)2 marks· Physics · Unit 1 Q1 1(c)What is the MOST likely value of the constant n?
55. 3(b)(i)2 marks· Physics · Unit 1 Q3 3(b)(i)On Figure 4 show the forces acting on the mass.
56. 3(b)(ii)a)2 marks· Physics · Unit 1 Q3 3(b)(ii)a)At the LOWEST point, calculate the tension in the wire.
57. 4(a)6 marks· Physics · Unit 1 Q4 4(a)Discuss the nature, cause and effect of frictional forces.
58. 4(a)5 marks· Physics · Unit 1 Q4 4(a)State fully what is meant by the expression 'the Principle of Moments'. With the aid of an appropriate diagram, use the Principle of Moments to explain how it is possible for a person of mass 50 kg to lift someone twice…
59. 4(a)5 marks· Physics · Unit 1 Q4 4(a)By referring to Figure 7, explain the origin of upthrust and how upthrust determines whether an object will float or sink.
60. 4(a)(i)1 mark· Physics · Unit 1 Q4 4(a)(i)State the conditions necessary for a body to be in equilibrium under the action of coplanar forces.
61. 4(a)(ii)7 marks· Physics · Unit 1 Q4 4(a)(ii)Find the tension in the cord and the magnitude of F.
62. 4(a)(ii)8 marks· Physics · Unit 1 Q4 4(a)(ii)Explain why a small sphere, released from rest at the surface to fall through liquid in a deep tank, eventually moves with a constant speed. Sketch a graph showing how the acceleration of the sphere varies with time…
63. 4(b)1 mark· Physics · Unit 1 Q4 4(b)The drag force acting on the balloon is given by F_D = (1/2)πr²ρv², where r is the radius of the balloon, ρ is the density of air, and v is the ascension speed of the balloon.
64. 4(b)4 marks· Physics · Unit 1 Q4 4(b)What is the magnitude and direction of the resultant horizontal force acting on the racing car while it is travelling around the curve?
65. 4(b)(i)1 mark· Physics · Unit 1 Q4 4(b)(i)Draw a free body diagram showing the forces acting on the rock.
66. 4(b)(i)4 marks· Physics · Unit 1 Q4 4(b)(i)An extended object (e.g. a uniform wooden plank) is acted upon by several forces. State TWO conditions for the object to remain in equilibrium. Using these two conditions, write TWO equations relating the forces and…
67. 4(b)(i)12 marks· Physics · Unit 1 Q4 4(b)(i)Draw a free body diagram to show the forces acting on the balloon.
68. 4(b)(i)6 marks· Physics · Unit 1 Q4 4(b)(i)Draw the free body diagram showing the forces acting on the mass.
69. 4(b)(ii)2 marks· Physics · Unit 1 Q4 4(b)(ii)Explain what is meant by a 'viscous medium'.
70. 4(b)(ii)6 marks· Physics · Unit 1 Q4 4(b)(ii)Figure 5 depicts a uniform plank, weight 200 N, leaning against a smooth wall. The foot of the plank is 3 m from the wall and the top of the ladder is 6 m from the ground. Find a) The upward push, R, of the ground on…
71. 4(b)(ii)1 mark· Physics · Unit 1 Q4 4(b)(ii)Calculate a) the tension in the string b) the speed of the mass.
72. 4(b)(ii)a)12 marks· Physics · Unit 1 Q4 4(b)(ii)a)Use Archimedes' principle to find the buoyant force acting on the balloon.
73. 4(b)(ii)b)12 marks· Physics · Unit 1 Q4 4(b)(ii)b)Calculate the terminal velocity of the balloon.
74. 4(c)(i)1 mark· Physics · Unit 1 Q4 4(c)(i)Draw a free body diagram to show the forces acting on the gymnast at Q.
75. 4(c)(i)a)1 mark· Physics · Unit 1 Q4 4(c)(i)a)Draw a diagram to show the forces acting on the stone in a vertical circle when it is at its highest point.
76. 4(c)(i)b)1 mark· Physics · Unit 1 Q4 4(c)(i)b)Draw a diagram to show the forces acting on the stone in a vertical circle when it is at its lowest point.
77. 4(c)(ii)1 mark· Physics · Unit 1 Q4 4(c)(ii)Calculate the buoyant force, F_b.
78. 4(c)(ii)1 mark· Physics · Unit 1 Q4 4(c)(ii)Outline the reason why the reading on the spring balance was lower when the ornament was immersed in water than when it was immersed in corn oil.
79. 4(c)(ii)3 marks· Physics · Unit 1 Q4 4(c)(ii)Calculate the tension in the rope as the string passes Q.
80. 4(c)(ii)2 marks· Physics · Unit 1 Q4 4(c)(ii)In what position along the vertical circular path is the string MOST likely to break? Suggest a reason for your answer.
81. 4(c)(iii)3 marks· Physics · Unit 1 Q4 4(c)(iii)At what angular speed will the spring break?
82. 4(c)(iv)1 mark· Physics · Unit 1 Q4 4(c)(iv)Calculate the terminal velocity of the rock.
83. 5(a)(iii)a)1 mark· Physics · Unit 1 Q5 5(a)(iii)a)What energy change takes place when a ball bearing is falling at its terminal velocity?
84. 5(a)(iii)b)1 mark· Physics · Unit 1 Q5 5(a)(iii)b)What causes this energy change to take place?
85. 5(b)2 marks· Physics · Unit 1 Q5 5(b)Calculate the gravitational force of attraction.
86. 5(b)(i)7 marks· Physics · Unit 1 Q5 5(b)(i)Draw diagrams showing the forces acting on the ball when it is (a) at the top and (b) at the bottom of the circle.
87. 5(b)(i)1 mark· Physics · Unit 1 Q5 5(b)(i)Draw a diagram like the one in Figure V with arrows to show the direction of the external forces acting on the aeroplane as it turns. On a second, similar diagram show the direction of the RESULTANT force acting on the…
88. 5(b)(i)4 marks· Physics · Unit 1 Q5 5(b)(i)Sketch a diagram to represent the arrangement described in the scenario above showing ALL the forces acting and ALL the distances described.
89. 5(b)(ii)7 marks· Physics · Unit 1 Q5 5(b)(ii)Show that when this critical value is reached the angular speed of the ball is given by ω = sqrt((T_max - mg)/(ml)).
90. 5(b)(ii)5 marks· Physics · Unit 1 Q5 5(b)(ii)Calculate the frictional force between the ladder and the ground.
91. 5(b)(iii)7 marks· Physics · Unit 1 Q5 5(b)(iii)Calculate the critical value, T_max.
92. 5(b)(iii)1 mark· Physics · Unit 1 Q5 5(b)(iii)Find the size of the lift force on the plane and the banking angle θ.
93. 5(e)3 marks· Physics · Unit 1 Q5 5(e)What will he weigh on planet P?
94. 9(c)(iv)1 mark· Physics · Unit 1 Q9 9(c)(iv)What is the upthrust on an object which when placed in the Liquid L, caused the liquid level to rise from BB₁ to AA₁?