Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 584 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 8 N, a glass sheet 1 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
2. 2.True or false: closing a drawer is a push. (a) True (b) False
3. 3.⚖️ A seesaw balances. Meena (300 N) sits 4 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
5. 5.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
6. 6.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
7. 7.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Meena (120 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
8. 8.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
9. 9.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
10. 10.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
11. 11.True or false: a smooth steel slide gives less friction. (a) True (b) False
12. 12.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
13. 13.🪝 A winch has a wheel of radius 16 cm and an axle of radius 2 cm. What effort on the wheel lifts a 640 N bucket on the axle, in newtons? (ideal)
14. 14.True or false: a crowbar is a class 2 lever (load in the middle). (a) True (b) False
15. 15.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
16. 16.💪 Two children push a box to the right, one with 100 N and the other with 10 N. What is the net (total) force on the box, in newtons?
17. 17.Which of these is a wedge? (a) a nutcracker (b) a water tap handle (c) the tip of a nail (d) a road up a hill
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 12 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, ice 1 N, a glass sheet 4 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
20. 20.🪝 A load of 630 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.True or false: a grippy rubber sole gives more friction. (a) False (b) True
22. 22.Which of these is a pulley? (a) a nut and bolt (b) a bottle opener (c) a flagpole rope wheel (d) a water tap handle
23. 23.Which of these is caused by magnetic force? (a) a compass needle turns (b) shoes grip the floor (c) squeezing a lemon (d) a thrown ball comes down
24. 24.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
25. 25.True or false: pressing a doorbell is a push. (a) True (b) False
26. 26.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
27. 27.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) less effort needed (d) more effort needed
28. 28.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
29. 29.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.🪝 A bucket weighing 490 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
32. 32.🪝 A load of 520 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
33. 33.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
34. 34.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) anywhere (d) closer to the pivot
35. 35.🔍 Which is the odd one out? (a) a steering wheel (b) a road up a hill (c) a well winch handle (d) a water tap handle
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 8 N, sandpaper 10 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
37. 37.⚖️ A seesaw balances. Ravi (200 N) sits 3 m from the pivot on one side; Arjun (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) litre (L) (d) newton (N)
39. 39.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
40. 40.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 280 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?

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