Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 17 · 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 of these is a screw? (a) a well-bucket rope wheel (b) a bottle opener (c) the tip of a nail (d) a screw jack
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a wooden plank 10 N, sandpaper 13 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
3. 3.⚖️ A seesaw balances. Asha (420 N) sits 1 m from the pivot on one side; Arjun (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
4. 4.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a rough doormat (d) oil on a squeaky hinge
6. 6.Which of these is a lever? (a) a water tap handle (b) a wheelchair ramp (c) a crane hook block (d) a nutcracker
7. 7.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Meena (160 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
8. 8.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) True (b) False
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 2 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
10. 10.True or false: sand on a slippery path gives less friction. (a) True (b) False
11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
12. 12.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
13. 13.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) use a smaller force (c) make new energy (d) switch off gravity
14. 14.💪 Which force pulls everything towards the Earth? (a) gravity (b) friction (c) wind (d) magnetism
15. 15.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
16. 16.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
17. 17.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
18. 18.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) both weights are equal (d) turning effects match
19. 19.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False
20. 20.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
21. 21.True or false: pressing a doorbell is a push. (a) True (b) False
22. 22.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Zoya (180 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 2 (c) class 3
24. 24.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
25. 25.🪝 A pulley system lifts an 880 N load with an effort of 220 N. What is its mechanical advantage (MA)?
26. 26.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 320 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.⚖️ A lever bar balances. The load is 200 N at 40 cm from the fulcrum. The effort is 160 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crowbar (c) a window blind cord (d) a flagpole rope wheel
29. 29.💪 In which unit do we measure force? (a) newton (N) (b) litre (L) (c) second (s) (d) metre (m)
30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 1 N, a glass sheet 5 N, a wooden plank 7 N. How many newtons more were needed on a carpet than on ice?
32. 32.💪 A bag has a mass of 51 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
34. 34.⚖️ A seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Arjun (680 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
36. 36.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
37. 37.⚖️ A lever bar balances. The load is 360 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?
38. 38.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Ravi (130 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
39. 39.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 10 (d) 6
40. 40.💪 Which force is at work: a fridge magnet sticks? (a) magnetic force (b) muscular force (c) gravity (d) friction

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