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Engineering Worksheet: Forces

Engineering lesson 9: Forces: push, pull and gravity · Set 65 · 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.💪 A bag has a mass of 27 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) pedalling a cycle (c) a rolling ball slows (d) a magnet picks up pins
  3. 3.💪 Which force is at work: rain falls to the ground? (a) gravity (b) muscular force (c) friction (d) magnetic force
  4. 4.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) balanced (c) doubled (d) gravity
  5. 5.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
  6. 6.💪 A bag has a mass of 53 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  7. 7.💪 Two children push a box to the right, one with 70 N and the other with 30 N. What is the net (total) force on the box, in newtons?
  8. 8.💪 Two children push a box to the right, one with 50 N and the other with 90 N. What is the net (total) force on the box, in newtons?
  9. 9.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
  10. 10.💪 Which force is at work: squeezing a lemon? (a) friction (b) magnetic force (c) muscular force (d) gravity
  11. 11.💪 Which force is at work: lifting a school bag? (a) gravity (b) muscular force (c) friction (d) magnetic force
  12. 12.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
  13. 13.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
  14. 14.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
  15. 15.💪 Which force is at work: a river flows downhill? (a) muscular force (b) friction (c) magnetic force (d) gravity
  16. 16.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
  17. 17.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
  18. 18.💪 A cart is pulled to the right with 25 N and to the left with 15 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
  19. 19.Which of these is caused by gravity? (a) brakes stop a bicycle (b) pedalling a cycle (c) a thrown ball comes down (d) a magnet picks up pins
  20. 20.💪 A box weighs 180 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  21. 21.💪 A box weighs 170 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  22. 22.💪 A cart is pulled to the right with 80 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
  23. 23.Which of these is caused by magnetic force? (a) shoes grip the floor (b) a magnet picks up pins (c) brakes stop a bicycle (d) rain falls to the ground
  24. 24.💪 Which force is at work: a compass needle turns? (a) muscular force (b) magnetic force (c) gravity (d) friction
  25. 25.True or false: pushing a trolley is a pull. (a) True (b) False
  26. 26.💪 A bag has a mass of 14 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  27. 27.💪 A bag has a mass of 59 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  28. 28.True or false: pulling a cart is a push. (a) True (b) False
  29. 29.💪 A bag has a mass of 48 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  30. 30.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
  31. 31.💪 A bag has a mass of 36 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  32. 32.True or false: pressing a doorbell is a push. (a) False (b) True
  33. 33.True or false: drawing up a well bucket is a pull. (a) False (b) True
  34. 34.True or false: pushing a swing is a pull. (a) False (b) True
  35. 35.💪 Which force is at work: an apple falls down? (a) friction (b) gravity (c) muscular force (d) magnetic force
  36. 36.True or false: pushing a trolley is a push. (a) True (b) False
  37. 37.True or false: hitting a cricket ball is a pull. (a) True (b) False
  38. 38.True or false: drawing up a well bucket is a push. (a) True (b) False
  39. 39.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
  40. 40.💪 A cart is pulled to the right with 40 N and to the left with 50 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force

Answer key

  1. 270
  2. a rolling ball slows
  3. gravity
  4. balanced
  5. a pull
  6. 530
  7. 100
  8. 140
  9. a pull
  10. muscular force
  11. muscular force
  12. a pull
  13. change its colour
  14. a push
  15. gravity
  16. a push
  17. a pull
  18. to the right
  19. a thrown ball comes down
  20. 18
  21. 17
  22. to the left
  23. a magnet picks up pins
  24. magnetic force
  25. False
  26. 140
  27. 590
  28. False
  29. 480
  30. newton (N)
  31. 360
  32. True
  33. True
  34. False
  35. gravity
  36. True
  37. False
  38. False
  39. a push
  40. to the left

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