Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 88 · 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) powder on a carrom board (b) oil on a squeaky hinge (c) a smooth steel slide (d) a grippy rubber sole
2. 2.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) on the fulcrum (d) far from the fulcrum
3. 3.⚙️ Which simple machine is a claw hammer on a nail? (a) inclined plane (b) screw (c) lever (d) wedge
4. 4.Which of these is an inclined plane? (a) a jar lid (b) a crane hook block (c) a road up a hill (d) a bottle opener
5. 5.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
6. 6.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
7. 7.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
8. 8.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
9. 9.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
10. 10.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 30 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
12. 12.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) magnetism (d) gravity
13. 13.🪝 More rope sections holding a load means … (a) the load floats (b) no change (c) less effort needed (d) more effort needed
14. 14.True or false: a fixed pulley stays in one place. (a) True (b) False
15. 15.⚖️ A seesaw balances. Arjun (? N) sits 1 m from the pivot on one side; Asha (110 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
16. 16.⚖️ A seesaw balances. Asha (800 N) sits 1 m from the pivot on one side; Arjun (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 90 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
19. 19.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum
20. 20.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 3 (c) class 1
21. 21.⚖️ A lever bar balances. The load is 240 N at 10 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
23. 23.⚖️ A lever bar balances. The load is 540 N at 50 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
25. 25.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a flat ramp (d) a smaller rod (axle)
26. 26.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) muscular force (c) friction (d) gravity
27. 27.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
28. 28.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
29. 29.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.⚙️ Which simple machine is a wood screw? (a) lever (b) screw (c) wheel and axle (d) pulley
31. 31.💪 Which force is at work: squeezing a lemon? (a) gravity (b) friction (c) muscular force (d) magnetic force
32. 32.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
33. 33.True or false: pushing a trolley is a push. (a) False (b) True
34. 34.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) a wheel on a rod (d) two ramps back to back
35. 35.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
36. 36.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
37. 37.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) wet (d) magnetic
38. 38.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) False (b) True
39. 39.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
40. 40.⚖️ A seesaw balances. Kabir (140 N) sits ? m from the pivot on one side; Asha (140 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?

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