Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 720 · 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 of these is caused by friction? (a) a river flows downhill (b) shoes grip the floor (c) squeezing a lemon (d) an apple falls down
2. 2.💪 Two children push a box to the right, one with 20 N and the other with 60 N. What is the net (total) force on the box, in newtons?
3. 3.True or false: a truck loading ramp is a wedge. (a) True (b) False
4. 4.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
5. 5.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
6. 6.Which of these is a screw? (a) a window blind cord (b) a bottle opener (c) a bottle cap (d) a flagpole rope wheel
7. 7.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
8. 8.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
9. 9.🔍 Which is the odd one out? (a) a steering wheel (b) a well winch handle (c) a crowbar (d) a water tap handle
10. 10.True or false: a road up a hill is an inclined plane. (a) False (b) True
11. 11.True or false: a tyre with deep treads gives less friction. (a) False (b) True
12. 12.🪝 A bucket weighing 250 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
13. 13.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) True (b) False
14. 14.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
15. 15.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
16. 16.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the colour of rope (d) the direction of pull
17. 17.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
18. 18.True or false: sand on a slippery path gives less friction. (a) True (b) False
19. 19.True or false: a flagpole rope wheel is a pulley. (a) True (b) False
20. 20.⚖️ A lever bar balances. The load is 120 N at 40 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.🪝 A bucket weighing 110 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 bag has a mass of 12 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
23. 23.True or false: a rough doormat gives less friction. (a) True (b) False
24. 24.💪 Which can a force NOT do? (a) stop it moving (b) change its shape (c) change its colour (d) start it moving
25. 25.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a tyre with deep treads (d) a wheel on ball bearings
26. 26.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 2 (c) class 1
27. 27.Which of these is a screw? (a) the tip of a nail (b) a steering wheel (c) a nut and bolt (d) a playground slide
28. 28.🪝 A winch has a wheel of radius 10 cm and an axle of radius 5 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
29. 29.💪 Two children push a box to the right, one with 90 N and the other with 35 N. What is the net (total) force on the box, in newtons?
30. 30.⚖️ A lever bar balances. The load is 900 N at 40 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
31. 31.True or false: pushing a trolley is a pull. (a) True (b) False
32. 32.Which of these is caused by magnetic force? (a) lifting a school bag (b) rubbing hands warms them (c) a magnet picks up pins (d) a rolling ball slows
33. 33.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
34. 34.Which of these is an inclined plane? (a) a road up a hill (b) a knife edge (c) a wood screw (d) a well winch handle
35. 35.🪝 A well winch has a handle (wheel) of radius 18 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
36. 36.⚖️ A lever bar balances. The load is 30 N at 20 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 3 (c) class 1
38. 38.True or false: a fixed pulley needs effort = load. (a) True (b) False
39. 39.⚖️ A seesaw balances. Arjun (420 N) sits 3 m from the pivot on one side; Zoya (420 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
40. 40.Which of these is caused by muscular force? (a) a thrown ball comes down (b) squeezing a lemon (c) rain falls to the ground (d) a rolling ball slows

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