Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 748 · 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 class of lever is a fishing rod? (a) class 1 (b) class 2 (c) class 3
2. 2.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
3. 3.⚙️ A screw is really … (a) a ramp wrapped round (b) a bent lever (c) a tiny pulley (d) a kind of wheel
4. 4.True or false: a nutcracker is a lever. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) a crowbar (b) a seesaw (c) a steering wheel (d) a claw hammer on a nail
6. 6.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
8. 8.💪 A cart is pulled to the right with 90 N and to the left with 95 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
9. 9.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
11. 11.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
12. 12.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a screw jack (c) a flagpole rope wheel (d) a crane hook block
13. 13.⚙️ Which simple machine is a water tap handle? (a) lever (b) inclined plane (c) wedge (d) wheel and axle
14. 14.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
15. 15.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
16. 16.⚖️ A seesaw balances. Asha (420 N) sits ? m from the pivot on one side; Kabir (280 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
17. 17.🪝 A bucket weighing 120 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
18. 18.Which of these is a wedge? (a) a road up a hill (b) a flagpole rope wheel (c) a chisel (d) a water tap handle
19. 19.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
20. 20.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
21. 21.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) powder on a carrom board (d) a tyre with deep treads
22. 22.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
23. 23.True or false: plucking a mango is a pull. (a) True (b) False
24. 24.⚖️ A lever bar balances. The load is 420 N at 20 cm from the fulcrum. The effort is 140 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
26. 26.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.⚖️ A lever bar balances. The load is 800 N at ? cm from the fulcrum. The effort is 400 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
29. 29.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
30. 30.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
31. 31.True or false: a fixed pulley only changes direction. (a) False (b) True
32. 32.True or false: a bottle opener is a class 2 lever (load in the middle). (a) False (b) True
33. 33.⚖️ A lever bar balances. The load is 280 N at 30 cm from the fulcrum. The effort is 210 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.True or false: a grippy rubber sole gives less friction. (a) True (b) False
35. 35.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
37. 37.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
38. 38.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
39. 39.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
40. 40.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a compass needle turns (c) a rolling ball slows (d) pedalling a cycle

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