Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 551 · 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.True or false: pushing a trolley is a push. (a) True (b) False
2. 2.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
3. 3.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) powder on a carrom board (d) chalk on a gym bar
4. 4.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 80 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
5. 5.⚖️ A seesaw balances. Arjun (120 N) sits 3 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
7. 7.🪝 A pulley system lifts a 40 N load with an effort of 20 N. What is its mechanical advantage (MA)?
8. 8.True or false: a chisel is a pulley. (a) True (b) False
9. 9.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
10. 10.True or false: a movable pulley is on a flagpole top. (a) True (b) False
11. 11.💪 In a tug of war, one team pulls left with 85 N and the other pulls right with 70 N. What is the size of the net force, in newtons?
12. 12.True or false: a steering wheel is a wheel and axle. (a) False (b) True
13. 13.🪝 A bucket weighing 140 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.⚖️ A lever bar balances. The load is 720 N at 10 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?
15. 15.Which of these is a pulley? (a) a screw jack (b) a road up a hill (c) a door stopper (d) a well-bucket rope wheel
16. 16.True or false: a movable pulley needs effort = load. (a) False (b) True
17. 17.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 500 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
19. 19.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
20. 20.🪝 A pulley system lifts a 450 N load with an effort of 150 N. What is its mechanical advantage (MA)?
21. 21.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
22. 22.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
23. 23.⚖️ A seesaw balances. Arjun (100 N) sits ? m from the pivot on one side; Kabir (400 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
24. 24.🪝 A pulley system lifts a 240 N load with an effort of 60 N. What is its mechanical advantage (MA)?
25. 25.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
26. 26.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
27. 27.💪 Which force is at work: a rolling ball slows? (a) friction (b) gravity (c) muscular force (d) magnetic force
28. 28.⚙️ Which simple machine is a door stopper? (a) pulley (b) inclined plane (c) lever (d) wedge
29. 29.True or false: a movable pulley only changes direction. (a) False (b) True
30. 30.💪 In a tug of war, one team pulls right with 90 N and the other pulls left with 65 N. What is the size of the net force, in newtons?
31. 31.🪝 A well winch has a handle (wheel) of radius 25 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
32. 32.🪝 A load of 800 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
33. 33.⚙️ A screw is really … (a) a ramp wrapped round (b) a bent lever (c) a kind of wheel (d) a tiny pulley
34. 34.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
35. 35.⚖️ A lever bar balances. The load is 700 N at 50 cm from the fulcrum. The effort is 500 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
37. 37.⚖️ Which class of lever is a bottle opener? (a) class 2 (b) class 1 (c) class 3
38. 38.💪 Two children push a box to the right, one with 40 N and the other with 95 N. What is the net (total) force on the box, in newtons?
39. 39.⚙️ Which simple machine is a well winch handle? (a) wheel and axle (b) inclined plane (c) pulley (d) wedge
40. 40.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?

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