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Engineering Worksheet: Forces

Engineering lesson 9: Forces: push, pull and gravity · Set 339 · 40 questions
TalentJR

Engineer's tip (Add same way, subtract opposite): Push moves away, pull moves towards; force is measured in newtons (N). Same direction: add. Opposite directions: bigger − smaller, towards the bigger. Weight (N) ≈ mass (kg) × 10.

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  1. 1.💪 Two children push a box to the right, one with 95 N and the other with 10 N. What is the net (total) force on the box, in newtons?
  2. 2.💪 A force is a … (a) unit of time (b) push or a pull (c) kind of colour (d) type of sound
  3. 3.💪 Which force is at work: rain falls to the ground? (a) friction (b) magnetic force (c) muscular force (d) gravity
  4. 4.Which of these is caused by friction? (a) rain falls to the ground (b) a fridge magnet sticks (c) rubbing hands warms them (d) lifting a school bag
  5. 5.Which of these is caused by muscular force? (a) rain falls to the ground (b) rubbing hands warms them (c) a river flows downhill (d) pedalling a cycle
  6. 6.💪 A box weighs 330 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  7. 7.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
  8. 8.True or false: drawing up a well bucket is a push. (a) True (b) False
  9. 9.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) magnetism (d) gravity
  10. 10.💪 A box weighs 120 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  11. 11.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
  12. 12.💪 In a tug of war, one team pulls right with 70 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
  13. 13.True or false: opening a drawer is a pull. (a) True (b) False
  14. 14.💪 Which force is at work: pedalling a cycle? (a) magnetic force (b) friction (c) muscular force (d) gravity
  15. 15.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) newton (N) (d) second (s)
  16. 16.💪 Which force is at work: a fridge magnet sticks? (a) muscular force (b) magnetic force (c) friction (d) gravity
  17. 17.True or false: opening a drawer is a push. (a) False (b) True
  18. 18.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
  19. 19.Which of these is caused by gravity? (a) brakes stop a bicycle (b) a fridge magnet sticks (c) squeezing a lemon (d) an apple falls down
  20. 20.True or false: pressing a doorbell is a push. (a) False (b) True
  21. 21.💪 Two children push a box to the right, one with 5 N and the other with 65 N. What is the net (total) force on the box, in newtons?
  22. 22.True or false: pushing a trolley is a push. (a) False (b) True
  23. 23.💪 A cart is pulled to the right with 100 N and to the left with 90 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
  24. 24.💪 A bag has a mass of 52 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  25. 25.True or false: pushing a trolley is a pull. (a) True (b) False
  26. 26.💪 Two children push a box to the right, one with 85 N and the other with 30 N. What is the net (total) force on the box, in newtons?
  27. 27.True or false: closing a drawer is a push. (a) True (b) False
  28. 28.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
  29. 29.💪 A cart is pulled to the right with 55 N and to the left with 45 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
  30. 30.Which of these is caused by friction? (a) shoes grip the floor (b) a river flows downhill (c) lifting a school bag (d) a compass needle turns
  31. 31.True or false: hitting a cricket ball is a pull. (a) True (b) False
  32. 32.True or false: drawing up a well bucket is a pull. (a) False (b) True
  33. 33.True or false: plucking a mango is a pull. (a) True (b) False
  34. 34.True or false: pushing a swing is a push. (a) False (b) True
  35. 35.True or false: closing a drawer is a pull. (a) True (b) False
  36. 36.💪 A cart is pulled to the right with 50 N and to the left with 40 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
  37. 37.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
  38. 38.💪 In a tug of war, one team pulls right with 30 N and the other pulls left with 15 N. What is the size of the net force, in newtons?
  39. 39.💪 Two children push a box to the right, one with 85 N and the other with 5 N. What is the net (total) force on the box, in newtons?
  40. 40.💪 Which can a force NOT do? (a) change its colour (b) change its shape (c) start it moving (d) stop it moving

Answer key

  1. 105
  2. push or a pull
  3. gravity
  4. rubbing hands warms them
  5. pedalling a cycle
  6. 33
  7. a push
  8. False
  9. gravity
  10. 12
  11. balanced
  12. 60
  13. True
  14. muscular force
  15. newton (N)
  16. magnetic force
  17. False
  18. a push
  19. an apple falls down
  20. True
  21. 70
  22. True
  23. to the right
  24. 520
  25. False
  26. 115
  27. True
  28. a pull
  29. to the right
  30. shoes grip the floor
  31. False
  32. True
  33. True
  34. True
  35. False
  36. to the right
  37. a pull
  38. 15
  39. 90
  40. change its colour

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