Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 246 · 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: brakes stopping a cycle? (a) a problem (b) helpful
2. 2.True or false: a fixed pulley only changes direction. (a) False (b) True
3. 3.⚖️ A seesaw balances. Meena (100 N) sits ? m from the pivot on one side; Asha (100 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) sandpaper (d) glass
5. 5.⚙️ Which simple machine is a door stopper? (a) wheel and axle (b) wedge (c) lever (d) pulley
6. 6.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
7. 7.True or false: powder on a carrom board gives more friction. (a) False (b) True
8. 8.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
9. 9.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) True (b) False
10. 10.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
11. 11.💪 A force is a … (a) type of sound (b) kind of colour (c) unit of time (d) push or a pull
12. 12.🛞 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 6 N, sandpaper 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
13. 13.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
14. 14.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 12 (d) 3
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 1 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
16. 16.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
17. 17.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
18. 18.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
19. 19.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) False (b) True
20. 20.🪝 A load of 1120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.💪 Which can a force NOT do? (a) stop it moving (b) change its shape (c) start it moving (d) change its colour
22. 22.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, ice 2 N, a glass sheet 4 N. How many newtons more were needed on a carpet than on ice?
24. 24.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) unbalanced (c) gravity (d) balanced
25. 25.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) cold (d) warm
26. 26.⚖️ A lever bar balances. The load is 150 N at 20 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
28. 28.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
29. 29.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) magnetism (d) gravity
30. 30.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
31. 31.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
32. 32.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
33. 33.True or false: pulling up your socks is a push. (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 5 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on ice?
35. 35.⚖️ A lever bar balances. The load is 400 N at 20 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.True or false: pushing a trolley is a pull. (a) False (b) True
37. 37.True or false: a screw jack is a lever. (a) True (b) False
38. 38.⚙️ Which simple machine is a steering wheel? (a) pulley (b) lever (c) wheel and axle (d) wedge
39. 39.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 500 N bucket on the axle, in newtons? (ideal)
40. 40.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 950 N bucket on the axle, in newtons? (ideal)

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