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Engineering Worksheet: Forces

Engineering lesson 9: Forces: push, pull and gravity · Set 675 · 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.Which of these is caused by friction? (a) a thrown ball comes down (b) squeezing a lemon (c) a rolling ball slows (d) a river flows downhill
  2. 2.💪 Which force is at work: a fridge magnet sticks? (a) muscular force (b) magnetic force (c) gravity (d) friction
  3. 3.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
  4. 4.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) muscular force (c) friction (d) gravity
  5. 5.💪 In a tug of war, one team pulls left with 55 N and the other pulls right with 30 N. What is the size of the net force, in newtons?
  6. 6.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
  7. 7.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) friction (c) muscular force (d) gravity
  8. 8.Which of these is caused by muscular force? (a) shoes grip the floor (b) squeezing a lemon (c) rain falls to the ground (d) rubbing hands warms them
  9. 9.💪 A bag has a mass of 30 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  10. 10.💪 Which force is at work: lifting a school bag? (a) muscular force (b) gravity (c) magnetic force (d) friction
  11. 11.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) rubbing hands warms them (c) pedalling a cycle (d) lifting a school bag
  12. 12.💪 Which can a force NOT do? (a) change its shape (b) change its colour (c) stop it moving (d) start it moving
  13. 13.💪 Two children push a box to the right, one with 5 N and the other with 5 N. What is the net (total) force on the box, in newtons?
  14. 14.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
  15. 15.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
  16. 16.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
  17. 17.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
  18. 18.💪 A box weighs 550 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  19. 19.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
  20. 20.💪 Two children push a box to the right, one with 90 N and the other with 25 N. What is the net (total) force on the box, in newtons?
  21. 21.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) doubled (c) balanced (d) unbalanced
  22. 22.💪 Two children push a box to the right, one with 20 N and the other with 25 N. What is the net (total) force on the box, in newtons?
  23. 23.True or false: closing a drawer is a push. (a) True (b) False
  24. 24.💪 In a tug of war, one team pulls right with 35 N and the other pulls left with 15 N. What is the size of the net force, in newtons?
  25. 25.💪 Two children push a box to the right, one with 20 N and the other with 70 N. What is the net (total) force on the box, in newtons?
  26. 26.💪 A cart is pulled to the right with 85 N and to the left with 85 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
  27. 27.💪 A box weighs 20 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  28. 28.💪 In a tug of war, one team pulls left with 30 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
  29. 29.💪 A cart is pulled to the right with 30 N and to the left with 20 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
  30. 30.💪 Which force is at work: a compass needle turns? (a) gravity (b) muscular force (c) magnetic force (d) friction
  31. 31.💪 Which force is at work: shoes grip the floor? (a) gravity (b) muscular force (c) friction (d) magnetic force
  32. 32.True or false: pushing a swing is a push. (a) True (b) False
  33. 33.💪 In which unit do we measure force? (a) newton (N) (b) second (s) (c) litre (L) (d) metre (m)
  34. 34.💪 A bag has a mass of 57 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  35. 35.💪 A bag has a mass of 3 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  36. 36.💪 A bag has a mass of 51 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  37. 37.💪 In a tug of war, one team pulls right with 15 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
  38. 38.💪 A box weighs 190 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  39. 39.True or false: kicking a football is a pull. (a) True (b) False
  40. 40.Which of these is caused by friction? (a) pedalling a cycle (b) an apple falls down (c) rubbing hands warms them (d) rain falls to the ground

Answer key

  1. a rolling ball slows
  2. magnetic force
  3. 70
  4. friction
  5. 25
  6. a push
  7. gravity
  8. squeezing a lemon
  9. 300
  10. muscular force
  11. a fridge magnet sticks
  12. change its colour
  13. 10
  14. a push
  15. a push
  16. a pull
  17. a pull
  18. 55
  19. a pull
  20. 115
  21. balanced
  22. 45
  23. True
  24. 20
  25. 90
  26. no net force
  27. 2
  28. 20
  29. to the right
  30. magnetic force
  31. friction
  32. True
  33. newton (N)
  34. 570
  35. 30
  36. 510
  37. 5
  38. 19
  39. False
  40. rubbing hands warms them

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