← Part 2 test: forces and machines lesson New set →

Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 682 · 40 questions
TalentJR

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

NameDateTime takenScore ___ / 40
  1. 1.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
  2. 2.⚖️ A seesaw balances. Kabir (760 N) sits ? m from the pivot on one side; Zoya (380 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
  3. 3.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Meena (300 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
  4. 4.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
  5. 5.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) skating on ice (d) sand on a slippery path
  6. 6.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Zoya (190 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
  8. 8.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
  9. 9.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
  10. 10.💪 A force is a … (a) type of sound (b) unit of time (c) kind of colour (d) push or a pull
  11. 11.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Meena (390 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
  12. 12.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the effort (d) the load
  13. 13.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 1 (c) class 2
  14. 14.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
  15. 15.💪 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?
  16. 16.⚖️ What is the pivot point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
  17. 17.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Ravi (800 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
  18. 18.Which of these is caused by friction? (a) a thrown ball comes down (b) a compass needle turns (c) shoes grip the floor (d) a fridge magnet sticks
  19. 19.True or false: a pair of tweezers is a class 3 lever (effort in the middle). (a) True (b) False
  20. 20.True or false: a wheelbarrow is a class 3 lever (effort in the middle). (a) True (b) False
  21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, ice 1 N, a glass sheet 3 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
  22. 22.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  23. 23.⚖️ A seesaw balances. Ravi (540 N) sits 3 m from the pivot on one side; Arjun (540 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
  24. 24.💪 A box weighs 480 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
  25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
  26. 26.⚖️ A lever bar balances. The load is 360 N at 50 cm from the fulcrum. The effort is 450 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
  27. 27.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
  28. 28.🪝 A bucket weighing 400 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  29. 29.🪝 A pulley system lifts a 1200 N load with an effort of 300 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  31. 31.True or false: a rough doormat gives less friction. (a) False (b) True
  32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a glass sheet 7 N, a wooden plank 9 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
  33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 1 N, a wooden plank 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
  34. 34.🔍 Which is the odd one out? (a) a jar lid (b) a wood screw (c) a screw jack (d) a wheelchair ramp
  35. 35.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 2 (c) class 1
  36. 36.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a flat ramp (d) a loose rope
  37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
  38. 38.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) closer to the pivot (d) farther from the pivot
  39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 8 N, sandpaper 11 N, ice 2 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
  40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper

Answer key

  1. a glass sheet
  2. 2
  3. 450
  4. class 1
  5. sand on a slippery path
  6. 900
  7. 570
  8. a movable pulley
  9. less friction
  10. push or a pull
  11. 390
  12. the fulcrum
  13. class 1
  14. a problem
  15. 45
  16. the fulcrum
  17. 800
  18. shoes grip the floor
  19. True
  20. False
  21. ice
  22. 2
  23. 3
  24. 48
  25. sandpaper
  26. 40
  27. a problem
  28. 400
  29. 4
  30. joule (J)
  31. False
  32. ice
  33. 8
  34. a wheelchair ramp
  35. class 3
  36. a smaller rod (axle)
  37. class 3
  38. closer to the pivot
  39. sandpaper
  40. sandpaper

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids