Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 190 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
2. 2.💪 In a tug of war, one team pulls left with 80 N and the other pulls right with 60 N. What is the size of the net force, in newtons?
3. 3.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
4. 4.⚖️ A lever bar balances. The load is 210 N at 40 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
6. 6.⚖️ A lever bar balances. The load is 50 N at 40 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
7. 7.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) gravity (c) friction (d) muscular force
8. 8.⚖️ A seesaw balances. Asha (600 N) sits 3 m from the pivot on one side; Kabir (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) start it moving (d) change its shape
10. 10.💪 A box weighs 560 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
11. 11.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
12. 12.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) friction (c) gravity (d) muscular force
13. 13.⚖️ A seesaw balances. Arjun (150 N) sits ? m from the pivot on one side; Ravi (450 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
14. 14.🔍 Which is the odd one out? (a) a road up a hill (b) a playground slide (c) a wheelchair ramp (d) a bottle cap
15. 15.🏋️ Pushing a crate 8 m took 240 J of work. What force was used, in newtons?
16. 16.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) stop all friction (c) use a smaller force (d) switch off gravity
17. 17.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Kabir (760 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 6 (d) 10
19. 19.True or false: a well-bucket rope wheel is a pulley. (a) False (b) True
20. 20.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) muscular force (c) gravity (d) friction
21. 21.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) a grippy rubber sole (d) skating on ice
22. 22.🔍 Which is the odd one out? (a) chalk on a gym bar (b) oil on a squeaky hinge (c) sand on a slippery path (d) a grippy rubber sole
23. 23.💪 A bag has a mass of 9 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
24. 24.⚖️ A seesaw balances. Arjun (? N) sits 2 m from the pivot on one side; Kabir (400 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🪝 A well winch has a handle (wheel) of radius 28 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 12 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
27. 27.⚖️ A seesaw balances. Asha (400 N) sits ? m from the pivot on one side; Kabir (800 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
28. 28.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
31. 31.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a loose rope (d) a flat ramp
32. 32.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
33. 33.⚙️ Which simple machine is a water tap handle? (a) lever (b) inclined plane (c) wheel and axle (d) wedge
34. 34.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
35. 35.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 2 (c) class 3
36. 36.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 3 (c) class 2
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
38. 38.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
39. 39.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
40. 40.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids