Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 4 · 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) 3 (b) 12 (c) 10 (d) 6
2. 2.🛞 Friction acts … (a) against the motion (b) with the motion (c) only upwards (d) only on ice
3. 3.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
5. 5.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
6. 6.💪 A bag has a mass of 47 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
7. 7.True or false: a tyre with deep treads gives less friction. (a) False (b) True
8. 8.💪 A force is a … (a) unit of time (b) push or a pull (c) type of sound (d) kind of colour
9. 9.True or false: a tyre with deep treads gives more friction. (a) True (b) False
10. 10.⚖️ A seesaw balances. Kabir (260 N) sits ? m from the pivot on one side; Zoya (390 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
11. 11.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) distance from fulcrum (d) colour of bar
12. 12.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
13. 13.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
14. 14.🪝 A winch has a wheel of radius 8 cm and an axle of radius 1 cm. What effort on the wheel lifts a 720 N bucket on the axle, in newtons? (ideal)
15. 15.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) warm (d) magnetic
16. 16.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
17. 17.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 1 (c) class 2
18. 18.True or false: a wheelchair ramp is an inclined plane. (a) False (b) True
19. 19.💪 A box weighs 40 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
20. 20.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Asha (120 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.🪝 A pulley system lifts a 360 N load with an effort of 120 N. What is its mechanical advantage (MA)?
22. 22.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
23. 23.💪 In a tug of war, one team pulls right with 75 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
24. 24.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) the fulcrum moves (d) both weights are equal
25. 25.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
26. 26.True or false: a smooth steel slide gives less friction. (a) False (b) True
27. 27.⚖️ 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 1 (c) class 2
28. 28.⚖️ A seesaw balances. Arjun (140 N) sits 2 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.⚖️ A lever bar balances. The load is 100 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?
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) sand on a slippery path (d) a wheel on ball bearings
31. 31.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
32. 32.True or false: pulling up your socks is a push. (a) True (b) False
33. 33.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) anywhere (d) farther from the pivot
34. 34.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3
35. 35.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🪝 A load of 600 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.Which of these is a pulley? (a) a window blind cord (b) a wood screw (c) a nut and bolt (d) a screw jack
38. 38.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
39. 39.💪 Which force is at work: a magnet picks up pins? (a) gravity (b) friction (c) muscular force (d) magnetic force
40. 40.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?

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