Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 563 · 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.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
2. 2.⚖️ A lever bar balances. The load is 80 N at 10 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
4. 4.True or false: a knife edge is an inclined plane. (a) True (b) False
5. 5.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 140 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) sandpaper (d) polished marble
7. 7.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a wheel on ball bearings (d) chalk on a gym bar
8. 8.⚖️ 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
9. 9.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) change its shape (d) start it moving
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 8 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
11. 11.True or false: a tyre with deep treads gives more friction. (a) True (b) False
12. 12.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
13. 13.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
14. 14.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
15. 15.💪 Which force is at work: squeezing a lemon? (a) muscular force (b) friction (c) gravity (d) magnetic force
16. 16.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
17. 17.⚖️ A lever bar balances. The load is 720 N at ? cm from the fulcrum. The effort is 90 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.⚙️ Which simple machine is a well winch handle? (a) wheel and axle (b) inclined plane (c) screw (d) pulley
19. 19.💪 Which force is at work: pedalling a cycle? (a) gravity (b) magnetic force (c) friction (d) muscular force
20. 20.True or false: pushing a swing is a pull. (a) True (b) False
21. 21.⚖️ A seesaw balances. Zoya (440 N) sits 3 m from the pivot on one side; Asha (330 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
22. 22.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
23. 23.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the load (c) the effort (d) the fulcrum
24. 24.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) friction (c) gravity (d) magnetic force
25. 25.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) cold (d) wet
26. 26.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
27. 27.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
28. 28.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) closer to the pivot (d) on the pivot
29. 29.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 40 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Zoya (720 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Zoya (120 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.True or false: closing a drawer is a push. (a) True (b) False
33. 33.True or false: a nutcracker is a wedge. (a) False (b) True
34. 34.⚙️ A screw is really … (a) a ramp wrapped round (b) a tiny pulley (c) a bent lever (d) a kind of wheel
35. 35.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
36. 36.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
37. 37.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) oil the moving parts (d) add sand
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 7 N, sandpaper 8 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
39. 39.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Kabir (150 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.Which of these is an inclined plane? (a) a flagpole rope wheel (b) a chisel (c) a screw jack (d) a truck loading ramp

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