Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 298 · 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 lever bar balances. The load is 210 N at 50 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
2. 2.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
3. 3.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Asha (240 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🔍 Which is the odd one out? (a) a truck loading ramp (b) a road up a hill (c) a wheelchair ramp (d) a claw hammer on a nail
5. 5.⚙️ Which simple machine is a well winch handle? (a) lever (b) pulley (c) wheel and axle (d) wedge
6. 6.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) pulley (c) wedge (d) wheel and axle
7. 7.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
8. 8.⚖️ A seesaw balances. Arjun (480 N) sits ? m from the pivot on one side; Zoya (240 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
9. 9.🔍 Which is the odd one out? (a) powder on a carrom board (b) a grippy rubber sole (c) a tyre with deep treads (d) sand on a slippery path
10. 10.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) the fulcrum moves (d) both weights are equal
11. 11.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
13. 13.⚖️ A lever bar balances. The load is 250 N at ? cm from the fulcrum. The effort is 200 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.⚖️ A lever bar balances. The load is 120 N at 20 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?
15. 15.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
17. 17.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 8 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
19. 19.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 150 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 2 (c) class 1
21. 21.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 240 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a playground slide (c) a flagpole rope wheel (d) a window blind cord
23. 23.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
24. 24.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
25. 25.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
26. 26.True or false: your forearm is a class 1 lever (fulcrum in the middle). (a) True (b) False
27. 27.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
28. 28.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 2 (c) class 3
29. 29.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
31. 31.True or false: an axe blade is a wedge. (a) True (b) False
32. 32.Which of these is a wedge? (a) a nutcracker (b) a crane hook block (c) the tip of a nail (d) a well winch handle
33. 33.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
35. 35.True or false: closing a drawer is a pull. (a) True (b) False
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
37. 37.⚖️ A lever bar balances. The load is 400 N at 10 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
38. 38.⚙️ Which simple machine is a knife edge? (a) wedge (b) screw (c) wheel and axle (d) lever
39. 39.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) True (b) False
40. 40.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 1 (c) class 2

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