Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 928 · 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 is the odd one out? (a) the tip of a nail (b) a jar lid (c) a door stopper (d) a knife edge
2. 2.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a carpet 11 N, sandpaper 12 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 80 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
6. 6.⚙️ Which simple machine is a crane hook block? (a) pulley (b) screw (c) wheel and axle (d) lever
7. 7.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
8. 8.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
9. 9.⚖️ A seesaw balances. Kabir (640 N) sits 1 m from the pivot on one side; Asha (160 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
10. 10.🪝 A load of 560 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
11. 11.True or false: a rough doormat gives less friction. (a) False (b) True
12. 12.🪝 A well winch has a handle (wheel) of radius 25 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
13. 13.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) use a smaller force (c) stop all friction (d) make new energy
14. 14.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
15. 15.⚖️ A seesaw balances. Asha (190 N) sits 3 m from the pivot on one side; Arjun (570 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
16. 16.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 6 (d) 12
17. 17.True or false: a grippy rubber sole gives more friction. (a) True (b) False
18. 18.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) newton (N) (d) litre (L)
19. 19.True or false: a bottle opener is a class 2 lever (load in the middle). (a) False (b) True
20. 20.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
21. 21.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
22. 22.⚖️ A seesaw balances. Arjun (110 N) sits 1 m from the pivot on one side; Asha (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
23. 23.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
24. 24.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a seesaw (c) a flagpole rope wheel (d) a bottle opener
25. 25.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 640 N bucket on the axle, in newtons? (ideal)
26. 26.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
28. 28.⚙️ Which simple machine is a crowbar? (a) screw (b) pulley (c) lever (d) wedge
29. 29.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
30. 30.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) the bar is short (d) turning effects match
31. 31.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
32. 32.Which of these is a pulley? (a) a flagpole rope wheel (b) the tip of a nail (c) a knife edge (d) a wheelchair ramp
33. 33.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
34. 34.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a loose rope (d) a sharp wedge
35. 35.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wheel on ball bearings (c) a rough doormat (d) a grippy rubber sole
36. 36.💪 A box weighs 380 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
37. 37.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
38. 38.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
39. 39.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) muscular force (c) friction (d) magnetic force
40. 40.⚖️ 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 2 (c) class 1

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