Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 153 · 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.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) skating on ice (c) a grippy rubber sole (d) a wet tiled floor
2. 2.Which of these is a wedge? (a) a claw hammer on a nail (b) a truck loading ramp (c) a round doorknob (d) the tip of a nail
3. 3.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) inclined plane (c) pulley (d) wheel and axle
4. 4.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
5. 5.💪 A cart is pulled to the right with 20 N and to the left with 30 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
6. 6.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
7. 7.⚙️ Which simple machine is a door stopper? (a) screw (b) wheel and axle (c) wedge (d) lever
8. 8.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 150 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
11. 11.Which of these is caused by friction? (a) an apple falls down (b) a thrown ball comes down (c) rubbing hands warms them (d) a compass needle turns
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, ice 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
13. 13.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
14. 14.⚖️ A lever bar balances. The load is 320 N at 30 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, ice 2 N, a glass sheet 3 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
16. 16.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
18. 18.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a well-bucket rope wheel (c) a window blind cord (d) a jar lid
20. 20.⚖️ A seesaw balances. Asha (600 N) sits 4 m from the pivot on one side; Zoya (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.True or false: pulling up your socks is a pull. (a) False (b) True
22. 22.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) magnetic force (c) gravity (d) friction
23. 23.True or false: opening a drawer is a push. (a) True (b) False
24. 24.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
25. 25.⚖️ A seesaw balances. Kabir (220 N) sits 4 m from the pivot on one side; Meena (440 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
27. 27.Which of these is caused by muscular force? (a) an apple falls down (b) a magnet picks up pins (c) a river flows downhill (d) pedalling a cycle
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a flat ramp (d) a sharp wedge
30. 30.True or false: skating on ice gives more friction. (a) True (b) False
31. 31.💪 A cart is pulled to the right with 70 N and to the left with 70 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
32. 32.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
33. 33.Which of these is a pulley? (a) a jar lid (b) the tip of a nail (c) a bottle cap (d) a window blind cord
34. 34.⚙️ A wedge is … (a) two ramps back to back (b) a rope on a wheel (c) a wheel on a rod (d) a bar on a pivot
35. 35.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
36. 36.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 2 (c) class 3
37. 37.True or false: a rough doormat gives more friction. (a) False (b) True
38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
40. 40.Which of these is caused by magnetic force? (a) a rolling ball slows (b) a magnet picks up pins (c) squeezing a lemon (d) an apple falls down

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