Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 725 · 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.💪 A box weighs 40 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
4. 4.🪝 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)
5. 5.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
6. 6.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
7. 7.🛞 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 wooden plank 4 N, a carpet 7 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
8. 8.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
9. 9.🔍 Which is the odd one out? (a) a road up a hill (b) a wheelchair ramp (c) a well-bucket rope wheel (d) a truck loading ramp
10. 10.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 35 N. What is the size of the net force, in newtons?
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
12. 12.True or false: drawing up a well bucket is a pull. (a) False (b) True
13. 13.🪝 A load of 510 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
15. 15.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
16. 16.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Kabir (420 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚖️ A lever bar balances. The load is 360 N at 50 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
19. 19.⚙️ Which simple machine is a crane hook block? (a) lever (b) screw (c) wedge (d) pulley
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
21. 21.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
22. 22.⚙️ Which simple machine is an axe blade? (a) pulley (b) inclined plane (c) lever (d) wedge
23. 23.💪 Which can a force NOT do? (a) change its shape (b) start it moving (c) change its colour (d) stop it moving
24. 24.⚖️ A seesaw balances. Arjun (800 N) sits 1 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 1 (c) class 3
26. 26.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the effort (c) nothing (d) the fulcrum
27. 27.🔍 Which is the odd one out? (a) a jar lid (b) a bottle cap (c) a nut and bolt (d) a crane hook block
28. 28.Which of these is a lever? (a) a well-bucket rope wheel (b) a truck loading ramp (c) a claw hammer on a nail (d) a round doorknob
29. 29.⚖️ A seesaw balances. Arjun (400 N) sits ? m from the pivot on one side; Ravi (100 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🔍 Which is the odd one out? (a) a crowbar (b) a bottle opener (c) a seesaw (d) an axe blade
31. 31.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 150 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 3 (c) class 2
33. 33.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) more effort needed (d) the load floats
34. 34.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) gravity (d) balanced
35. 35.⚙️ A screw is really … (a) a tiny pulley (b) a bent lever (c) a kind of wheel (d) a ramp wrapped round
36. 36.True or false: a fixed pulley halves the effort. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a grippy rubber sole (d) a wheel on ball bearings
38. 38.True or false: kicking a football is a push. (a) False (b) True
39. 39.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
40. 40.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True

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