Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 335 · 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.True or false: a nutcracker is a lever. (a) True (b) False
2. 2.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
3. 3.⚖️ A seesaw balances. Meena (180 N) sits 4 m from the pivot on one side; Ravi (720 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
4. 4.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 40 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
5. 5.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
6. 6.⚖️ A lever bar balances. The load is 420 N at 50 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
7. 7.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
8. 8.True or false: a box pushed on carpet gives less friction. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a rough doormat (d) a wheel on ball bearings
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
11. 11.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
12. 12.🔍 Which is the odd one out? (a) a steering wheel (b) a well winch handle (c) the tip of a nail (d) a water tap handle
13. 13.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
14. 14.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
15. 15.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) no change (d) less effort needed
17. 17.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
18. 18.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
19. 19.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) True (b) False
20. 20.⚙️ A wedge is … (a) two ramps back to back (b) a rope on a wheel (c) a bar on a pivot (d) a wheel on a rod
21. 21.True or false: a rough doormat gives less friction. (a) True (b) False
22. 22.True or false: a tug of war is a pull. (a) False (b) True
23. 23.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
25. 25.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
26. 26.⚖️ A seesaw balances. Kabir (160 N) sits ? m from the pivot on one side; Zoya (160 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
27. 27.🪝 A load of 1000 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
28. 28.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
29. 29.True or false: a movable pulley needs effort = load. (a) False (b) True
30. 30.True or false: a grippy rubber sole gives less friction. (a) False (b) True
31. 31.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 6 (d) 12
32. 32.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
33. 33.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) friction (d) gravity
34. 34.True or false: a steering wheel is a wheel and axle. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a water tap handle (b) the tip of a nail (c) a door stopper (d) a chisel
36. 36.Which of these is a wedge? (a) a knife edge (b) a well winch handle (c) a steering wheel (d) a well-bucket rope wheel
37. 37.True or false: a knife edge is a wedge. (a) False (b) True
38. 38.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False
39. 39.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2

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