Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 443 · 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.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 12 (c) 6 (d) 3
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a carpet 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
3. 3.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) False (b) True
4. 4.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
5. 5.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
6. 6.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
7. 7.🏋️ A force of 310 N pushes a cart 7 m along the floor. How much work is done, in joules?
8. 8.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
9. 9.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
10. 10.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
11. 11.🔍 Which is the odd one out? (a) a seesaw (b) a water tap handle (c) a round doorknob (d) a well winch handle
12. 12.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) unbalanced (c) gravity (d) doubled
13. 13.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
14. 14.True or false: pulling up your socks is a push. (a) False (b) True
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 8 N, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
16. 16.True or false: your forearm is a class 3 lever (effort in the middle). (a) True (b) False
17. 17.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 0 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
19. 19.💪 A force is a … (a) unit of time (b) kind of colour (c) type of sound (d) push or a pull
20. 20.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a carpet 7 N, sandpaper 9 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
22. 22.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a nut and bolt (c) a crowbar (d) a bottle opener
23. 23.🔍 Which is the odd one out? (a) a rough doormat (b) a tyre with deep treads (c) chalk on a gym bar (d) powder on a carrom board
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 60 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
25. 25.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) a box pushed on carpet (d) a wet tiled floor
26. 26.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) muscular force (c) friction (d) gravity
27. 27.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 30 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.🪝 A bucket weighing 440 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
29. 29.⚖️ A lever bar balances. The load is 360 N at 20 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.Which of these is caused by muscular force? (a) a rolling ball slows (b) an apple falls down (c) rubbing hands warms them (d) lifting a school bag
31. 31.⚖️ 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 2 (b) class 3 (c) class 1
32. 32.💪 Two children push a box to the right, one with 90 N and the other with 25 N. What is the net (total) force on the box, in newtons?
33. 33.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
34. 34.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
35. 35.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
36. 36.💪 Which force is at work: pedalling a cycle? (a) friction (b) gravity (c) magnetic force (d) muscular force
37. 37.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
38. 38.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 90 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
40. 40.Which of these is caused by gravity? (a) brakes stop a bicycle (b) a rolling ball slows (c) rain falls to the ground (d) pedalling a cycle

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