Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 485 · 40 questions

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.

1. 1.⚙️ Which simple machine is an axe blade? (a) lever (b) screw (c) wedge (d) pulley
2. 2.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 2 (c) class 1
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 100 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
4. 4.💪 Which can a force NOT do? (a) change its shape (b) start it moving (c) change its colour (d) stop it moving
5. 5.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) unbalanced (c) balanced (d) doubled
6. 6.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
7. 7.True or false: a jar lid is a screw. (a) True (b) False
8. 8.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
11. 11.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) gravity (c) friction (d) muscular force
12. 12.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
13. 13.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
14. 14.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 3 (c) class 2
15. 15.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
16. 16.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
17. 17.Which of these is caused by gravity? (a) a river flows downhill (b) pedalling a cycle (c) a rolling ball slows (d) shoes grip the floor
18. 18.⚖️ A seesaw balances. Arjun (? N) sits 3 m from the pivot on one side; Ravi (330 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
20. 20.⚖️ A seesaw balances. Arjun (? N) sits 1 m from the pivot on one side; Ravi (120 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the effort (c) the load (d) the fulcrum
22. 22.🔍 Which is the odd one out? (a) a water tap handle (b) a steering wheel (c) a claw hammer on a nail (d) a round doorknob
23. 23.True or false: a fixed pulley stays in one place. (a) True (b) False
24. 24.⚙️ Which simple machine is a knife edge? (a) wedge (b) screw (c) inclined plane (d) wheel and axle
25. 25.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
26. 26.True or false: a crane hook block is a pulley. (a) True (b) False
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, sandpaper 6 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
28. 28.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a loose rope (c) a sharp wedge (d) a smaller rod (axle)
30. 30.⚙️ A screw is really … (a) a tiny pulley (b) a ramp wrapped round (c) a bent lever (d) a kind of wheel
31. 31.Which of these is caused by gravity? (a) a compass needle turns (b) a fridge magnet sticks (c) an apple falls down (d) brakes stop a bicycle
32. 32.⚖️ Which class of lever is a lemon squeezer? (a) class 2 (b) class 3 (c) class 1
33. 33.Which of these is caused by friction? (a) lifting a school bag (b) a compass needle turns (c) shoes grip the floor (d) rain falls to the ground
34. 34.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 8 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
36. 36.True or false: a seesaw is a class 3 lever (effort in the middle). (a) False (b) True
37. 37.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 3 (c) class 1
38. 38.True or false: your forearm is a class 3 lever (effort in the middle). (a) True (b) False
39. 39.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
40. 40.⚖️ A lever bar balances. The load is 60 N at 10 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?

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