Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 570 · 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.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 10 (c) 3 (d) 12
2. 2.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
3. 3.⚖️ A lever bar balances. The load is 20 N at 40 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
4. 4.🔍 Which is the odd one out? (a) a rough doormat (b) a wet tiled floor (c) a grippy rubber sole (d) a box pushed on carpet
5. 5.🔍 Which is the odd one out? (a) a chisel (b) an axe blade (c) the tip of a nail (d) a flagpole rope wheel
6. 6.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
7. 7.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
8. 8.💪 A bag has a mass of 12 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
9. 9.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
10. 10.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
11. 11.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
12. 12.Which of these is caused by friction? (a) a river flows downhill (b) a thrown ball comes down (c) squeezing a lemon (d) a rolling ball slows
13. 13.🪝 A bucket weighing 80 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
14. 14.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
15. 15.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
16. 16.💪 Two children push a box to the right, one with 80 N and the other with 75 N. What is the net (total) force on the box, in newtons?
17. 17.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
18. 18.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
19. 19.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
20. 20.⚖️ 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 3 (c) class 2
21. 21.🔍 Which is the odd one out? (a) a wood screw (b) a well-bucket rope wheel (c) a crane hook block (d) a window blind cord
22. 22.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
23. 23.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 80 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
25. 25.⚖️ A lever bar balances. The load is 700 N at 10 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
26. 26.⚖️ A seesaw balances. Arjun (300 N) sits 4 m from the pivot on one side; Ravi (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
27. 27.🔍 Which is the odd one out? (a) a round doorknob (b) a well winch handle (c) a crowbar (d) a water tap handle
28. 28.True or false: a fixed pulley stays in one place. (a) True (b) False
29. 29.⚖️ A seesaw balances. Ravi (680 N) sits ? m from the pivot on one side; Zoya (510 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
31. 31.⚙️ Which simple machine is a knife edge? (a) screw (b) lever (c) wedge (d) inclined plane
32. 32.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 4 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
35. 35.🔍 Which is the odd one out? (a) a window blind cord (b) a well-bucket rope wheel (c) a flagpole rope wheel (d) a bottle opener
36. 36.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) colour of bar (d) distance from fulcrum
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
38. 38.⚖️ A lever bar balances. The load is 700 N at 40 cm from the fulcrum. The effort is 280 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.⚙️ Which simple machine is a nutcracker? (a) wedge (b) pulley (c) screw (d) lever
40. 40.⚖️ A seesaw balances. Asha (380 N) sits ? m from the pivot on one side; Zoya (190 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?

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