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Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 743 · 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.True or false: a rough doormat gives less friction. (a) False (b) True
  2. 2.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a rope on a wheel (d) a bar on a pivot
  3. 3.True or false: pressing a doorbell is a push. (a) False (b) True
  4. 4.⚙️ Which simple machine is a crane hook block? (a) wheel and axle (b) pulley (c) lever (d) screw
  5. 5.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
  6. 6.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) press parts harder (d) make parts rough
  7. 7.🪝 A winch has a wheel of radius 7 cm and an axle of radius 1 cm. What effort on the wheel lifts a 210 N bucket on the axle, in newtons? (ideal)
  8. 8.True or false: a grippy rubber sole gives less friction. (a) True (b) False
  9. 9.⚖️ A seesaw balances. Arjun (400 N) sits 4 m from the pivot on one side; Asha (800 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
  10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, a carpet 11 N, ice 4 N, a glass sheet 7 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
  11. 11.💪 A bag has a mass of 12 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  12. 12.⚙️ Which simple machine is a water tap handle? (a) wedge (b) wheel and axle (c) pulley (d) screw
  13. 13.Which of these is a lever? (a) a water tap handle (b) a nut and bolt (c) a chisel (d) a bottle opener
  14. 14.🪝 A pulley system lifts a 440 N load with an effort of 220 N. What is its mechanical advantage (MA)?
  15. 15.True or false: a claw hammer on a nail is a wedge. (a) True (b) False
  16. 16.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Zoya (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
  17. 17.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) stop it moving (d) change its colour
  18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, ice 1 N, a glass sheet 2 N, a carpet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
  19. 19.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
  20. 20.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
  21. 21.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  22. 22.⚖️ A seesaw balances. Ravi (600 N) sits ? m from the pivot on one side; Meena (300 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
  23. 23.True or false: a seesaw is a lever. (a) True (b) False
  24. 24.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) on the fulcrum (d) near the fulcrum
  25. 25.True or false: a fixed pulley only changes direction. (a) False (b) True
  26. 26.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
  27. 27.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
  28. 28.💪 Which force is at work: an apple falls down? (a) muscular force (b) gravity (c) magnetic force (d) friction
  29. 29.True or false: a box pushed on carpet gives more friction. (a) False (b) True
  30. 30.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
  31. 31.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 3 (c) class 1
  32. 32.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 1020 N bucket on the axle, in newtons? (ideal)
  33. 33.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
  34. 34.True or false: pulling up your socks is a pull. (a) False (b) True
  35. 35.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
  36. 36.True or false: a tyre with deep treads gives less friction. (a) False (b) True
  37. 37.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to save rubber (d) to grip the road
  38. 38.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
  39. 39.Which of these is a wedge? (a) a playground slide (b) the tip of a nail (c) a wood screw (d) a truck loading ramp
  40. 40.True or false: a movable pulley is on a flagpole top. (a) True (b) False

Answer key

  1. False
  2. two ramps back to back
  3. True
  4. pulley
  5. the fulcrum
  6. oil the moving parts
  7. 30
  8. False
  9. 2
  10. ice
  11. 120
  12. wheel and axle
  13. a bottle opener
  14. 2
  15. False
  16. 400
  17. change its colour
  18. sandpaper
  19. helpful
  20. a push
  21. 8
  22. 2
  23. True
  24. far from the fulcrum
  25. True
  26. True
  27. a pull
  28. gravity
  29. True
  30. a problem
  31. class 3
  32. 170
  33. distance from fulcrum
  34. True
  35. class 3
  36. False
  37. to grip the road
  38. more friction
  39. the tip of a nail
  40. False

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