Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 893 · 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.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
2. 2.True or false: sand on a slippery path gives more friction. (a) False (b) True
3. 3.🪝 A load of 60 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.🏋️ Pushing a crate 2 m took 960 J of work. What force was used, in newtons?
5. 5.🪝 A bucket weighing 480 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
6. 6.True or false: a flagpole rope wheel is a pulley. (a) False (b) True
7. 7.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
8. 8.🪝 A winch has a wheel of radius 24 cm and an axle of radius 4 cm. What effort on the wheel lifts a 120 N bucket on the axle, in newtons? (ideal)
9. 9.💪 A force is a … (a) unit of time (b) type of sound (c) kind of colour (d) push or a pull
10. 10.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
11. 11.🪝 A bucket weighing 200 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
12. 12.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
13. 13.⚖️ A lever bar balances. The load is 240 N at ? cm from the fulcrum. The effort is 60 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 3 (c) class 1
15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
16. 16.⚖️ A seesaw balances. Asha (220 N) sits ? m from the pivot on one side; Kabir (440 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
18. 18.True or false: a wet tiled floor gives less friction. (a) True (b) False
19. 19.True or false: a movable pulley halves the effort. (a) False (b) True
20. 20.Which of these is a lever? (a) a nutcracker (b) the tip of a nail (c) an axe blade (d) a jar lid
21. 21.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 6 (d) 10
22. 22.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 70 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.True or false: pushing a trolley is a push. (a) True (b) False
25. 25.True or false: a tug of war is a pull. (a) False (b) True
26. 26.Which of these is caused by gravity? (a) a rolling ball slows (b) a magnet picks up pins (c) brakes stop a bicycle (d) an apple falls down
27. 27.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) the direction of pull (d) gravity
29. 29.💪 A bag has a mass of 6 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
30. 30.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
31. 31.🔍 Which is the odd one out? (a) a road up a hill (b) a water tap handle (c) a steering wheel (d) a well winch handle
32. 32.⚖️ A lever bar balances. The load is 60 N at 40 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?
33. 33.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
34. 34.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) chalk on a gym bar (d) a box pushed on carpet
35. 35.⚙️ Which simple machine is the tip of a nail? (a) wedge (b) inclined plane (c) screw (d) pulley
36. 36.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
37. 37.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
38. 38.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
39. 39.True or false: powder on a carrom board gives less friction. (a) False (b) True
40. 40.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?

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