Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 146 · 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 class of lever is a nutcracker? (a) class 1 (b) class 3 (c) class 2
2. 2.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
3. 3.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 10 (d) 6
4. 4.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
5. 5.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
6. 6.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
7. 7.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) sand on a slippery path (c) powder on a carrom board (d) a wet tiled floor
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 8 N, a carpet 11 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
9. 9.💪 A bag has a mass of 14 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
10. 10.💪 In which unit do we measure force? (a) second (s) (b) litre (L) (c) newton (N) (d) metre (m)
11. 11.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
12. 12.🔍 Which is the odd one out? (a) a steering wheel (b) a water tap handle (c) a round doorknob (d) the tip of a nail
13. 13.⚙️ Which simple machine is a window blind cord? (a) wheel and axle (b) wedge (c) pulley (d) inclined plane
14. 14.True or false: drawing up a well bucket is a push. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a tyre with deep treads (c) a grippy rubber sole (d) a wheel on ball bearings
16. 16.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) unbalanced (c) doubled (d) gravity
17. 17.True or false: a movable pulley halves the effort. (a) False (b) True
18. 18.⚖️ A seesaw balances. Asha (160 N) sits ? m from the pivot on one side; Arjun (480 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
19. 19.⚖️ A seesaw balances. Ravi (260 N) sits 1 m from the pivot on one side; Arjun (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.🪝 A load of 240 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
22. 22.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) magnetic force (c) gravity (d) friction
23. 23.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
24. 24.True or false: a box pushed on carpet gives less friction. (a) False (b) True
25. 25.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
26. 26.True or false: a smooth steel slide gives more friction. (a) False (b) True
27. 27.🏋️ A force of 420 N did 3360 J of work. How many metres did the object move?
28. 28.💪 Two children push a box to the right, one with 40 N and the other with 90 N. What is the net (total) force on the box, in newtons?
29. 29.⚖️ A lever bar balances. The load is 20 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) polished marble (d) sandpaper
31. 31.🪝 A load of 450 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
32. 32.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
33. 33.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
34. 34.💪 A box weighs 440 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
35. 35.True or false: a steering wheel is a wedge. (a) True (b) False
36. 36.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
37. 37.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
38. 38.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 3 (c) class 2
39. 39.🪝 A load of 920 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.🏋️ A force of 450 N did 3150 J of work. How many metres did the object move?

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