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Engineering Worksheet: Forces

Engineering lesson 9: Forces: push, pull and gravity · Set 420 · 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.

NameDateTime takenScore ___ / 40
  1. 1.💪 A bag has a mass of 4 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  2. 2.Which of these is caused by friction? (a) a thrown ball comes down (b) a rolling ball slows (c) pedalling a cycle (d) a fridge magnet sticks
  3. 3.💪 A cart is pulled to the right with 20 N and to the left with 10 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
  4. 4.Which of these is caused by magnetic force? (a) shoes grip the floor (b) a magnet picks up pins (c) rubbing hands warms them (d) a river flows downhill
  5. 5.True or false: hitting a cricket ball is a pull. (a) True (b) False
  6. 6.Which of these is caused by gravity? (a) rain falls to the ground (b) a compass needle turns (c) a magnet picks up pins (d) a rolling ball slows
  7. 7.💪 Two children push a box to the right, one with 25 N and the other with 50 N. What is the net (total) force on the box, in newtons?
  8. 8.💪 In a tug of war, one team pulls right with 70 N and the other pulls left with 60 N. What is the size of the net force, in newtons?
  9. 9.True or false: kicking a football is a push. (a) False (b) True
  10. 10.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
  11. 11.💪 Two children push a box to the right, one with 90 N and the other with 60 N. What is the net (total) force on the box, in newtons?
  12. 12.💪 Two children push a box to the right, one with 50 N and the other with 65 N. What is the net (total) force on the box, in newtons?
  13. 13.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) newton (N) (d) metre (m)
  14. 14.💪 A bag has a mass of 2 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  15. 15.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
  16. 16.💪 Two children push a box to the right, one with 80 N and the other with 55 N. What is the net (total) force on the box, in newtons?
  17. 17.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 25 N. What is the size of the net force, in newtons?
  18. 18.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) friction (c) gravity (d) muscular force
  19. 19.True or false: closing a drawer is a push. (a) False (b) True
  20. 20.True or false: opening a drawer is a pull. (a) False (b) True
  21. 21.💪 A cart is pulled to the right with 55 N and to the left with 60 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
  22. 22.True or false: a tug of war is a pull. (a) True (b) False
  23. 23.True or false: closing a drawer is a pull. (a) True (b) False
  24. 24.💪 Which force is at work: a fridge magnet sticks? (a) friction (b) gravity (c) muscular force (d) magnetic force
  25. 25.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
  26. 26.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) friction (c) gravity (d) muscular force
  27. 27.💪 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?
  28. 28.💪 A box weighs 200 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  29. 29.💪 Which force is at work: an apple falls down? (a) friction (b) muscular force (c) gravity (d) magnetic force
  30. 30.💪 Two children push a box to the right, one with 25 N and the other with 45 N. What is the net (total) force on the box, in newtons?
  31. 31.Which of these is caused by friction? (a) brakes stop a bicycle (b) squeezing a lemon (c) a thrown ball comes down (d) lifting a school bag
  32. 32.💪 A bag has a mass of 17 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  33. 33.💪 Two children push a box to the right, one with 90 N and the other with 80 N. What is the net (total) force on the box, in newtons?
  34. 34.💪 A bag has a mass of 8 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  35. 35.💪 In a tug of war, one team pulls right with 90 N and the other pulls left with 35 N. What is the size of the net force, in newtons?
  36. 36.True or false: pushing a trolley is a pull. (a) False (b) True
  37. 37.💪 Two children push a box to the right, one with 100 N and the other with 5 N. What is the net (total) force on the box, in newtons?
  38. 38.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) unbalanced (c) gravity (d) balanced
  39. 39.💪 Which force is at work: a magnet picks up pins? (a) gravity (b) muscular force (c) friction (d) magnetic force
  40. 40.True or false: pulling a cart is a pull. (a) True (b) False

Answer key

  1. 40
  2. a rolling ball slows
  3. to the right
  4. a magnet picks up pins
  5. False
  6. rain falls to the ground
  7. 75
  8. 10
  9. True
  10. a push
  11. 150
  12. 115
  13. newton (N)
  14. 20
  15. a pull
  16. 135
  17. 50
  18. friction
  19. True
  20. True
  21. to the left
  22. True
  23. False
  24. magnetic force
  25. a pull
  26. muscular force
  27. 90
  28. 20
  29. gravity
  30. 70
  31. brakes stop a bicycle
  32. 170
  33. 170
  34. 80
  35. 55
  36. False
  37. 105
  38. balanced
  39. magnetic force
  40. True

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