Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 569 · 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.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
2. 2.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) friction (c) gravity (d) magnetic force
3. 3.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
4. 4.Which of these is a wedge? (a) a door stopper (b) a well-bucket rope wheel (c) a wood screw (d) a window blind cord
5. 5.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
6. 6.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
7. 7.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
8. 8.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
9. 9.💪 Two children push a box to the right, one with 80 N and the other with 5 N. What is the net (total) force on the box, in newtons?
10. 10.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.True or false: powder on a carrom board gives less friction. (a) True (b) False
12. 12.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
13. 13.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
14. 14.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🪝 A pulley system lifts an 80 N load with an effort of 40 N. What is its mechanical advantage (MA)?
17. 17.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) distance from fulcrum (d) colour of bar
18. 18.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
19. 19.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 2 (c) class 1
20. 20.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) True (b) False
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N, sandpaper 13 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
22. 22.🔍 Which is the odd one out? (a) a bottle opener (b) a claw hammer on a nail (c) a crane hook block (d) a nutcracker
23. 23.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
24. 24.⚙️ Which simple machine is a claw hammer on a nail? (a) wheel and axle (b) lever (c) wedge (d) screw
25. 25.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
26. 26.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
27. 27.🏋️ A force of 150 N did 750 J of work. How many metres did the object move?
28. 28.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
29. 29.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
30. 30.True or false: pushing a trolley is a pull. (a) False (b) True
31. 31.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
32. 32.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
33. 33.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
34. 34.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a box pushed on carpet (c) a tyre with deep treads (d) sand on a slippery path
35. 35.💪 Which force is at work: a river flows downhill? (a) muscular force (b) magnetic force (c) gravity (d) friction
36. 36.True or false: pressing a doorbell is a push. (a) True (b) False
37. 37.💪 A box weighs 550 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
38. 38.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) unbalanced (c) balanced (d) doubled
39. 39.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1

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