Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 59 · 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 force is at work: a compass needle turns? (a) muscular force (b) friction (c) gravity (d) magnetic force
2. 2.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
3. 3.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 3 (c) class 2
4. 4.🪝 A load of 660 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
5. 5.True or false: a grippy rubber sole gives more friction. (a) False (b) True
6. 6.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
7. 7.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) sand on a slippery path (d) a rough doormat
8. 8.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
9. 9.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 0 cm and the load at 80 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
11. 11.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
14. 14.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
15. 15.⚙️ Which simple machine is a nutcracker? (a) wedge (b) lever (c) pulley (d) screw
16. 16.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Kabir (540 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Kabir (440 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
19. 19.⚙️ A screw is really … (a) a ramp wrapped round (b) a tiny pulley (c) a kind of wheel (d) a bent lever
20. 20.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.🪝 A winch has a wheel of radius 25 cm and an axle of radius 5 cm. What effort on the wheel lifts a 750 N bucket on the axle, in newtons? (ideal)
22. 22.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) True (b) False
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 100 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
24. 24.🔍 Which is the odd one out? (a) a well winch handle (b) a road up a hill (c) a playground slide (d) a truck loading ramp
25. 25.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
27. 27.⚖️ A lever bar balances. The load is 60 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) anywhere (c) farther from the pivot (d) on the pivot
29. 29.Which of these is caused by friction? (a) brakes stop a bicycle (b) rain falls to the ground (c) squeezing a lemon (d) an apple falls down
30. 30.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
31. 31.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 1 (c) class 3
32. 32.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) friction (c) muscular force (d) gravity
33. 33.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
34. 34.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
35. 35.💪 Two children push a box to the right, one with 20 N and the other with 90 N. What is the net (total) force on the box, in newtons?
36. 36.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a sharp wedge (d) a flat ramp
37. 37.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
38. 38.🪝 A load of 920 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
39. 39.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 570 N bucket on the axle, in newtons? (ideal)
40. 40.💪 A bag has a mass of 22 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?

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