Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 817 · 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 movable pulley hangs on the rope loop. (a) False (b) True
2. 2.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
3. 3.⚖️ A seesaw balances. Asha (480 N) sits ? m from the pivot on one side; Ravi (240 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
4. 4.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) True (b) False
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 12 N, ice 4 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
6. 6.True or false: a steering wheel is a pulley. (a) True (b) False
7. 7.🪝 A load of 1040 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
8. 8.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) add sand (d) press parts harder
9. 9.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
10. 10.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 2 (c) class 1
11. 11.⚖️ A lever bar balances. The load is 280 N at ? cm from the fulcrum. The effort is 80 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
12. 12.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 2 (c) class 1
13. 13.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the load (d) the effort
14. 14.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) on the fulcrum (d) far from the fulcrum
15. 15.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) a rough doormat (d) a tyre with deep treads
16. 16.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) skating on ice (d) oil on a squeaky hinge
17. 17.True or false: plucking a mango is a pull. (a) False (b) True
18. 18.⚖️ A lever bar balances. The load is 160 N at 10 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a wheel on ball bearings (d) sand on a slippery path
20. 20.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot
22. 22.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 6 (d) 10
23. 23.🏋️ A force of 410 N did 2050 J of work. How many metres did the object move?
24. 24.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) two ramps back to back (d) a rope on a wheel
25. 25.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 1 (c) class 3
26. 26.⚖️ A lever bar balances. The load is 540 N at ? cm from the fulcrum. The effort is 450 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
28. 28.⚙️ Which simple machine is a water tap handle? (a) pulley (b) wedge (c) screw (d) wheel and axle
29. 29.Which of these is a screw? (a) a claw hammer on a nail (b) a round doorknob (c) a truck loading ramp (d) a jar lid
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 0 cm and the load at 80 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
31. 31.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
32. 32.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
33. 33.True or false: a crane hook block is a wedge. (a) True (b) False
34. 34.Which of these is a lever? (a) a nut and bolt (b) a bottle opener (c) a window blind cord (d) a flagpole rope wheel
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
36. 36.⚖️ A seesaw balances. Arjun (480 N) sits 3 m from the pivot on one side; Meena (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
37. 37.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) oil on a squeaky hinge (d) a rough doormat
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, sandpaper 11 N, ice 4 N, a glass sheet 7 N. How many newtons more were needed on sandpaper than on ice?
39. 39.True or false: pressing a doorbell is a pull. (a) True (b) False
40. 40.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Meena (440 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?

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