Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 216 · 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 force is at work: a thrown ball comes down? (a) magnetic force (b) friction (c) muscular force (d) gravity
2. 2.True or false: a movable pulley needs effort = load. (a) True (b) False
3. 3.⚙️ Which simple machine is a playground slide? (a) pulley (b) wedge (c) inclined plane (d) lever
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 4 N, sandpaper 8 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
5. 5.⚖️ A seesaw balances. Asha (160 N) sits ? m from the pivot on one side; Ravi (480 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
6. 6.⚖️ A seesaw balances. Asha (380 N) sits 1 m from the pivot on one side; Meena (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
7. 7.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
10. 10.⚖️ A seesaw balances. Ravi (450 N) sits 1 m from the pivot on one side; Asha (150 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
11. 11.⚖️ A seesaw balances. Kabir (680 N) sits 1 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.True or false: a tyre with deep treads gives less friction. (a) False (b) True
13. 13.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
14. 14.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
15. 15.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
16. 16.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) False (b) True
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 9 N, sandpaper 11 N, ice 4 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
18. 18.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
19. 19.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
20. 20.True or false: a box pushed on carpet gives less friction. (a) False (b) True
21. 21.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) True (b) False
23. 23.⚙️ Which simple machine is a wood screw? (a) wheel and axle (b) inclined plane (c) lever (d) screw
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
25. 25.💪 A bag has a mass of 54 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
26. 26.🔍 Which is the odd one out? (a) a crane hook block (b) a nutcracker (c) a well-bucket rope wheel (d) a flagpole rope wheel
27. 27.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
28. 28.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 80 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
30. 30.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
31. 31.🔍 Which is the odd one out? (a) a wet tiled floor (b) chalk on a gym bar (c) a smooth steel slide (d) powder on a carrom board
32. 32.True or false: a jar lid is a pulley. (a) True (b) False
33. 33.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
34. 34.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 20 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.Which of these is a lever? (a) a nut and bolt (b) a crowbar (c) a water tap handle (d) a flagpole rope wheel
36. 36.Which of these is a pulley? (a) a crowbar (b) a screw jack (c) a water tap handle (d) a window blind cord
37. 37.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
38. 38.True or false: a road up a hill is an inclined plane. (a) False (b) True
39. 39.⚖️ A seesaw balances. Kabir (110 N) sits 4 m from the pivot on one side; Ravi (440 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
40. 40.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Zoya (340 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?

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