Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 989 · 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 is the odd one out? (a) a wood screw (b) a bottle cap (c) a seesaw (d) a nut and bolt
3. 3.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
4. 4.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
6. 6.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
7. 7.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a bottle opener (c) a truck loading ramp (d) a nutcracker
8. 8.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
9. 9.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 0 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
11. 11.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
12. 12.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 270 N bucket on the axle, in newtons? (ideal)
13. 13.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) unbalanced (c) gravity (d) balanced
14. 14.💪 Two children push a box to the right, one with 60 N and the other with 55 N. What is the net (total) force on the box, in newtons?
15. 15.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🪝 A pulley system lifts a 380 N load with an effort of 190 N. What is its mechanical advantage (MA)?
17. 17.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
18. 18.💪 In which unit do we measure force? (a) second (s) (b) metre (m) (c) newton (N) (d) litre (L)
19. 19.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) True (b) False
20. 20.True or false: a bottle cap is a screw. (a) True (b) False
21. 21.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
22. 22.🪝 A load of 480 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
23. 23.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
24. 24.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 2 (c) class 1
25. 25.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 120 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crane hook block (c) a well winch handle (d) a flagpole rope wheel
27. 27.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
28. 28.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) two ramps back to back (d) a rope on a wheel
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
30. 30.💪 A force is a … (a) push or a pull (b) unit of time (c) type of sound (d) kind of colour
31. 31.True or false: powder on a carrom board gives more friction. (a) True (b) False
32. 32.True or false: a movable pulley is on a flagpole top. (a) True (b) False
33. 33.💪 A bag has a mass of 28 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
34. 34.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
36. 36.True or false: a grippy rubber sole gives less friction. (a) True (b) False
37. 37.⚖️ A seesaw balances. Arjun (600 N) sits ? m from the pivot on one side; Zoya (200 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
38. 38.🪝 A load of 120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
39. 39.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, a glass sheet 1 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?

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