Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 608 · 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.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
2. 2.Which of these is a pulley? (a) a chisel (b) a well winch handle (c) the tip of a nail (d) a window blind cord
3. 3.True or false: a rough doormat gives less friction. (a) True (b) False
4. 4.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
5. 5.True or false: a wet tiled floor gives more friction. (a) True (b) False
6. 6.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 2 (c) class 1
7. 7.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
8. 8.True or false: hitting a cricket ball is a push. (a) False (b) True
9. 9.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
10. 10.⚖️ A seesaw balances. Arjun (360 N) sits 1 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
11. 11.🔍 Which is the odd one out? (a) a knife edge (b) the tip of a nail (c) an axe blade (d) a well-bucket rope wheel
12. 12.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Asha (140 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
13. 13.Which of these is a pulley? (a) a playground slide (b) a screw jack (c) an axe blade (d) a well-bucket rope wheel
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 3 N, a carpet 4 N, sandpaper 5 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
15. 15.🔍 Which is the odd one out? (a) a nutcracker (b) a screw jack (c) a bottle cap (d) a wood screw
16. 16.⚖️ A seesaw balances. Kabir (180 N) sits ? m from the pivot on one side; Ravi (180 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
17. 17.⚖️ A seesaw balances. Meena (390 N) sits ? m from the pivot on one side; Zoya (390 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
18. 18.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
19. 19.🪝 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
20. 20.True or false: a knife edge is a wedge. (a) False (b) True
21. 21.⚖️ A lever bar balances. The load is 140 N at 10 cm from the fulcrum. The effort is 70 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
22. 22.True or false: kicking a football is a push. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a crowbar (c) an axe blade (d) a bottle opener
24. 24.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
25. 25.True or false: skating on ice gives more friction. (a) False (b) True
26. 26.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
27. 27.💪 A box weighs 460 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
28. 28.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) skating on ice (d) a wet tiled floor
29. 29.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) unbalanced (d) doubled
30. 30.True or false: closing a drawer is a push. (a) True (b) False
31. 31.⚖️ A seesaw balances. Asha (190 N) sits ? m from the pivot on one side; Arjun (570 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
32. 32.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
33. 33.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
34. 34.💪 A box weighs 550 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
35. 35.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
37. 37.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) gravity (c) magnetic force (d) friction
38. 38.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) muscular force (c) gravity (d) friction
39. 39.Which of these is caused by friction? (a) a rolling ball slows (b) a river flows downhill (c) rain falls to the ground (d) an apple falls down
40. 40.True or false: a fixed pulley stays in one place. (a) True (b) False

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