Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 955 · 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) a smooth steel slide (b) a rough doormat (c) oil on a squeaky hinge (d) skating on ice
2. 2.Which of these is caused by friction? (a) a magnet picks up pins (b) shoes grip the floor (c) a river flows downhill (d) an apple falls down
3. 3.🔍 Which is the odd one out? (a) a window blind cord (b) a crane hook block (c) a seesaw (d) a well-bucket rope wheel
4. 4.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a box pushed on carpet (d) sand on a slippery path
5. 5.🪝 A pulley system lifts a 540 N load with an effort of 180 N. What is its mechanical advantage (MA)?
6. 6.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) oil on a squeaky hinge (d) sand on a slippery path
7. 7.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
8. 8.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) warm (d) magnetic
9. 9.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) a rough doormat (d) powder on a carrom board
10. 10.💪 Which force is at work: a river flows downhill? (a) friction (b) gravity (c) muscular force (d) magnetic force
11. 11.True or false: a chisel is a wheel and axle. (a) False (b) True
12. 12.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
13. 13.⚖️ A lever bar balances. The load is 800 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?
14. 14.🔍 Which is the odd one out? (a) a wet tiled floor (b) a grippy rubber sole (c) oil on a squeaky hinge (d) skating on ice
15. 15.True or false: skating on ice gives less friction. (a) False (b) True
16. 16.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Asha (480 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) far from the fulcrum (c) near the fulcrum (d) on the fulcrum
18. 18.True or false: a box pushed on carpet gives less friction. (a) True (b) False
19. 19.🪝 A pulley system lifts a 660 N load with an effort of 220 N. What is its mechanical advantage (MA)?
20. 20.True or false: a movable pulley needs effort = load. (a) False (b) True
21. 21.True or false: a well winch handle is a screw. (a) True (b) False
22. 22.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
23. 23.🪝 A load of 440 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
24. 24.True or false: a movable pulley rises with the load. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) powder on a carrom board (b) sand on a slippery path (c) oil on a squeaky hinge (d) a wheel on ball bearings
26. 26.True or false: a nutcracker is a class 2 lever (load in the middle). (a) True (b) False
27. 27.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) pedalling a cycle (c) shoes grip the floor (d) a compass needle turns
28. 28.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) nothing (c) the effort (d) the fulcrum
29. 29.⚖️ A seesaw balances. Zoya (380 N) sits 1 m from the pivot on one side; Arjun (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
30. 30.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 40 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 7 N, sandpaper 9 N, ice 4 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, a glass sheet 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a carpet 4 N, sandpaper 6 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
34. 34.True or false: skating on ice gives more friction. (a) False (b) True
35. 35.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
37. 37.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 10 (c) 3 (d) 12
38. 38.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
39. 39.⚖️ A seesaw balances. Ravi (600 N) sits 2 m from the pivot on one side; Zoya (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
40. 40.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) False (b) True

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