Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 297 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
2. 2.Which of these is an inclined plane? (a) a playground slide (b) a round doorknob (c) a well-bucket rope wheel (d) a chisel
3. 3.Which of these is a lever? (a) a jar lid (b) a water tap handle (c) a well-bucket rope wheel (d) a crowbar
4. 4.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 7 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
6. 6.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) make new energy (c) stop all friction (d) use a smaller force
7. 7.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 2 (c) class 1
8. 8.⚙️ Which simple machine is a nut and bolt? (a) screw (b) lever (c) wheel and axle (d) pulley
9. 9.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
10. 10.💪 A force is a … (a) unit of time (b) type of sound (c) kind of colour (d) push or a pull
11. 11.⚖️ A lever bar balances. The load is 700 N at 20 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
14. 14.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) skating on ice (d) a smooth steel slide
15. 15.💪 A box weighs 320 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
16. 16.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 3 (c) class 2
17. 17.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
18. 18.⚙️ Which simple machine is a crowbar? (a) wheel and axle (b) inclined plane (c) pulley (d) lever
19. 19.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) gravity (c) magnetic force (d) friction
20. 20.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) on the fulcrum (c) far from the fulcrum (d) near the fulcrum
21. 21.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) friction (c) magnetic force (d) gravity
22. 22.💪 Which can a force NOT do? (a) change its colour (b) start it moving (c) change its shape (d) stop it moving
23. 23.True or false: a movable pulley halves the effort. (a) True (b) False
24. 24.🪝 A bucket weighing 270 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
25. 25.💪 Which force is at work: an apple falls down? (a) gravity (b) friction (c) magnetic force (d) muscular force
26. 26.Which of these is caused by magnetic force? (a) a river flows downhill (b) an apple falls down (c) a magnet picks up pins (d) rubbing hands warms them
27. 27.True or false: a beam balance is a class 3 lever (effort in the middle). (a) True (b) False
28. 28.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
29. 29.True or false: pressing a doorbell is a push. (a) False (b) True
30. 30.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
31. 31.Which of these is a screw? (a) a knife edge (b) a playground slide (c) a window blind cord (d) a nut and bolt
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 11 N, ice 2 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
33. 33.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
35. 35.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) doubled (c) gravity (d) unbalanced
36. 36.True or false: closing a drawer is a push. (a) False (b) True
37. 37.⚖️ A seesaw balances. Meena (130 N) sits ? m from the pivot on one side; Asha (130 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
39. 39.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
40. 40.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 100 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?

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