Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 560 · 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: pulling a cart is a push. (a) False (b) True
2. 2.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
3. 3.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
4. 4.🪝 A bucket weighing 210 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.True or false: the tip of a nail is a wedge. (a) True (b) False
6. 6.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
7. 7.💪 Which can a force NOT do? (a) change its shape (b) start it moving (c) change its colour (d) stop it moving
8. 8.Which of these is a pulley? (a) a truck loading ramp (b) a bottle opener (c) a flagpole rope wheel (d) a playground slide
9. 9.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
10. 10.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the load (c) the axle (d) the fulcrum
11. 11.⚙️ A screw is really … (a) a bent lever (b) a ramp wrapped round (c) a tiny pulley (d) a kind of wheel
12. 12.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
13. 13.⚖️ A lever bar balances. The load is 900 N at 10 cm from the fulcrum. The effort is 90 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🪝 A bucket weighing 500 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
15. 15.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 150 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) False (b) True
17. 17.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
18. 18.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 1 (c) class 3
19. 19.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
20. 20.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) friction (c) muscular force (d) gravity
21. 21.🪝 A bucket weighing 60 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
22. 22.⚖️ A lever bar balances. The load is 450 N at ? cm from the fulcrum. The effort is 250 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
24. 24.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) friction (c) muscular force (d) gravity
25. 25.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
26. 26.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
27. 27.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 3 (c) class 1
28. 28.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 2 (c) class 1
29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a smaller rod (axle) (d) a sharp wedge
30. 30.True or false: a round doorknob is a wheel and axle. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) a smooth steel slide (d) a box pushed on carpet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 12 N, a carpet 14 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
33. 33.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
35. 35.True or false: plucking a mango 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 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
37. 37.True or false: pushing a trolley is a push. (a) False (b) True
38. 38.True or false: a movable pulley rises with the load. (a) False (b) True
39. 39.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the effort (d) the load
40. 40.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort

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