Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 945 · 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 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)
2. 2.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) False (b) True
3. 3.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
5. 5.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) True (b) False
6. 6.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
8. 8.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) muscular force (c) friction (d) gravity
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 4 N, a glass sheet 5 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
10. 10.True or false: pushing a swing is a push. (a) False (b) True
11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the size of the load (d) the colour of rope
13. 13.💪 A force is a … (a) push or a pull (b) kind of colour (c) type of sound (d) unit of time
14. 14.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
15. 15.True or false: a crane hook block is a lever. (a) False (b) True
16. 16.⚙️ Which simple machine is a road up a hill? (a) wedge (b) screw (c) pulley (d) inclined plane
17. 17.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) sand on a slippery path (d) a wet tiled floor
18. 18.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the fulcrum (d) the effort
19. 19.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
20. 20.True or false: a fixed pulley only changes direction. (a) False (b) True
21. 21.⚙️ Which simple machine is a knife edge? (a) wheel and axle (b) wedge (c) screw (d) lever
22. 22.Which of these is caused by gravity? (a) a fridge magnet sticks (b) a magnet picks up pins (c) rubbing hands warms them (d) an apple falls down
23. 23.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) far from the fulcrum (d) on the fulcrum
24. 24.⚖️ A lever bar balances. The load is 400 N at 10 cm from the fulcrum. The effort is 40 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) closer to the pivot (d) on the pivot
26. 26.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
28. 28.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 3 (c) class 2
29. 29.Which of these is caused by muscular force? (a) a rolling ball slows (b) a compass needle turns (c) lifting a school bag (d) a magnet picks up pins
30. 30.🔍 Which is the odd one out? (a) a crane hook block (b) a window blind cord (c) a road up a hill (d) a flagpole rope wheel
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 8 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
32. 32.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) warm (d) magnetic
33. 33.True or false: a bottle opener is a class 2 lever (load in the middle). (a) False (b) True
34. 34.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
35. 35.True or false: opening a drawer is a pull. (a) True (b) False
36. 36.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
37. 37.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
38. 38.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
39. 39.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
40. 40.🪝 A bucket weighing 170 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)

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