Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 405 · 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 a road up a hill? (a) wheel and axle (b) inclined plane (c) screw (d) wedge
2. 2.True or false: a movable pulley needs effort = load. (a) True (b) False
3. 3.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
4. 4.🏋️ 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)
5. 5.⚖️ A seesaw balances. Zoya (450 N) sits 3 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
7. 7.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
8. 8.True or false: a flagpole rope wheel is a pulley. (a) True (b) False
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
10. 10.⚖️ A seesaw balances. Arjun (600 N) sits ? m from the pivot on one side; Kabir (400 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
11. 11.Which of these is an inclined plane? (a) a truck loading ramp (b) a nutcracker (c) a nut and bolt (d) a well-bucket rope wheel
12. 12.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
13. 13.True or false: a crane hook block is a pulley. (a) False (b) True
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
15. 15.🪝 A pulley system lifts a 240 N load with an effort of 80 N. What is its mechanical advantage (MA)?
16. 16.True or false: a grippy rubber sole gives less friction. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a grippy rubber sole (b) powder on a carrom board (c) a smooth steel slide (d) skating on ice
18. 18.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
19. 19.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
20. 20.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) False (b) True
21. 21.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 5 N, a wooden plank 8 N, a carpet 11 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
23. 23.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a rough doormat (c) chalk on a gym bar (d) a wet tiled floor
24. 24.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
25. 25.⚖️ A seesaw balances. Asha (150 N) sits 1 m from the pivot on one side; Kabir (150 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.💪 A force is a … (a) push or a pull (b) unit of time (c) kind of colour (d) type of sound
27. 27.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
28. 28.⚖️ A lever bar balances. The load is 800 N at 30 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.🪝 A pulley system lifts a 390 N load with an effort of 130 N. What is its mechanical advantage (MA)?
30. 30.⚖️ A seesaw balances. Meena (260 N) sits ? m from the pivot on one side; Zoya (520 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
31. 31.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
32. 32.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
33. 33.🪝 A bucket weighing 470 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
34. 34.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 3 (c) class 1
35. 35.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
36. 36.⚖️ A lever bar balances. The load is 160 N at 40 cm from the fulcrum. The effort is 320 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
37. 37.True or false: a seesaw is a lever. (a) False (b) True
38. 38.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the pulley (d) the effort
39. 39.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
40. 40.💪 Is kicking a football a push or a pull? (a) a pull (b) a push

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