Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 603 · 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.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
2. 2.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 6 (c) 10 (d) 12
3. 3.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
4. 4.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
5. 5.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
6. 6.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
7. 7.💪 Which force is at work: a fridge magnet sticks? (a) magnetic force (b) muscular force (c) gravity (d) friction
8. 8.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
9. 9.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) glass (d) polished marble
10. 10.🔍 Which is the odd one out? (a) a box pushed on carpet (b) chalk on a gym bar (c) a tyre with deep treads (d) a wet tiled floor
11. 11.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
12. 12.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
13. 13.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
14. 14.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
15. 15.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
16. 16.🪝 A load of 1160 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
17. 17.True or false: a chisel is a wedge. (a) False (b) True
18. 18.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) stop all friction (c) make new energy (d) use a smaller force
19. 19.True or false: pulling a cart is a pull. (a) True (b) False
20. 20.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
21. 21.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
23. 23.True or false: a grippy rubber sole gives less friction. (a) False (b) True
24. 24.🪝 A pulley system lifts a 200 N load with an effort of 50 N. What is its mechanical advantage (MA)?
25. 25.True or false: a knife edge is a lever. (a) True (b) False
26. 26.True or false: a wet tiled floor gives more friction. (a) True (b) False
27. 27.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
28. 28.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
29. 29.True or false: an axe blade is a wedge. (a) True (b) False
30. 30.⚖️ A seesaw balances. Meena (380 N) sits ? m from the pivot on one side; Arjun (570 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 7 N, ice 3 N. How many newtons more were needed on a carpet than on ice?
32. 32.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
33. 33.⚖️ A lever bar balances. The load is 540 N at ? cm from the fulcrum. The effort is 180 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the effort (d) the fulcrum
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 9 N, a carpet 10 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
36. 36.💪 A force is a … (a) unit of time (b) kind of colour (c) push or a pull (d) type of sound
37. 37.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
38. 38.True or false: opening a drawer is a push. (a) True (b) False
39. 39.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)

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