Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 887 · 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.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
3. 3.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) press parts harder (d) add sand
4. 4.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
5. 5.True or false: a bottle cap is a lever. (a) False (b) True
6. 6.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
7. 7.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
8. 8.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
9. 9.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
10. 10.⚙️ Which simple machine is a road up a hill? (a) inclined plane (b) lever (c) wheel and axle (d) wedge
11. 11.True or false: a crowbar is a class 2 lever (load in the middle). (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) a tyre with deep treads (d) a smooth steel slide
13. 13.True or false: a fixed pulley rises with the load. (a) True (b) False
14. 14.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
15. 15.🪝 A pulley system lifts a 580 N load with an effort of 290 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.True or false: a wet tiled floor gives more friction. (a) False (b) True
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
19. 19.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
21. 21.💪 A force is a … (a) kind of colour (b) unit of time (c) push or a pull (d) type of sound
22. 22.⚖️ 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
23. 23.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 2 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
25. 25.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
26. 26.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
27. 27.💪 A box weighs 10 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
28. 28.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
29. 29.🪝 A bucket weighing 360 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
32. 32.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
33. 33.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the effort (d) the load
34. 34.⚖️ A seesaw balances. Zoya (200 N) sits 3 m from the pivot on one side; Asha (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) True (b) False
36. 36.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
37. 37.⚖️ A seesaw balances. Asha (450 N) sits 4 m from the pivot on one side; Ravi (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 10 N, ice 2 N, a glass sheet 5 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a wooden plank (d) a glass sheet
39. 39.True or false: a knife edge is a wheel and axle. (a) True (b) False
40. 40.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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