Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 67 · 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 longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
2. 2.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) True (b) False
3. 3.🪝 A pulley system lifts a 540 N load with an effort of 180 N. What is its mechanical advantage (MA)?
4. 4.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 7 N, sandpaper 8 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
6. 6.⚙️ Which simple machine is a well-bucket rope wheel? (a) inclined plane (b) pulley (c) screw (d) wedge
7. 7.🔍 Which is the odd one out? (a) a playground slide (b) a round doorknob (c) a steering wheel (d) a well winch handle
8. 8.💪 A cart is pulled to the right with 75 N and to the left with 80 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
9. 9.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
10. 10.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) cold (d) wet
11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
12. 12.⚙️ Which simple machine is a jar lid? (a) pulley (b) lever (c) wheel and axle (d) screw
13. 13.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 120 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.True or false: kicking a football is a push. (a) False (b) True
15. 15.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
16. 16.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
17. 17.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
18. 18.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
19. 19.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
20. 20.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) friction (c) muscular force (d) gravity
21. 21.⚙️ Which simple machine is a wheelchair ramp? (a) inclined plane (b) lever (c) screw (d) wedge
22. 22.⚖️ A lever bar balances. The load is 300 N at 50 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
24. 24.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the load (c) the axle (d) the fulcrum
25. 25.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
26. 26.True or false: pulling up your socks is a pull. (a) True (b) False
27. 27.True or false: a smooth steel slide gives more friction. (a) False (b) True
28. 28.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 2 (c) class 1
29. 29.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
30. 30.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
31. 31.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
32. 32.True or false: a tug of war is a pull. (a) True (b) False
33. 33.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
34. 34.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) sand on a slippery path (d) powder on a carrom board
35. 35.🔍 Which is the odd one out? (a) a wood screw (b) a jar lid (c) a bottle opener (d) a nut and bolt
36. 36.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
37. 37.True or false: pushing a swing is a pull. (a) True (b) False
38. 38.💪 A cart is pulled to the right with 50 N and to the left with 35 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
39. 39.True or false: a movable pulley needs effort = load. (a) True (b) False
40. 40.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a sharp wedge (d) a smaller rod (axle)

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