Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 986 · 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 simple machine is a well-bucket rope wheel? (a) wheel and axle (b) pulley (c) lever (d) wedge
2. 2.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
4. 4.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.Which of these is a lever? (a) a window blind cord (b) a seesaw (c) an axe blade (d) a round doorknob
6. 6.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) nothing (c) the load (d) the effort
7. 7.True or false: a seesaw is a class 3 lever (effort in the middle). (a) True (b) False
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, sandpaper 14 N, a glass sheet 4 N, a wooden plank 8 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
9. 9.⚙️ Which simple machine is a window blind cord? (a) wedge (b) lever (c) inclined plane (d) pulley
10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
11. 11.🪝 A bucket weighing 370 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.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
13. 13.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) farther from the pivot (d) closer to the pivot
14. 14.💪 A box weighs 60 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
15. 15.Which of these is caused by gravity? (a) shoes grip the floor (b) a thrown ball comes down (c) a rolling ball slows (d) a fridge magnet sticks
16. 16.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 2 (c) class 3
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 15 N, ice 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, ice 3 N, a wooden plank 4 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
19. 19.⚖️ A seesaw balances. Meena (480 N) sits ? m from the pivot on one side; Zoya (240 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
20. 20.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
21. 21.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a tyre with deep treads (d) a box pushed on carpet
22. 22.⚖️ A lever bar balances. The load is 300 N at 10 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.💪 Two children push a box to the right, one with 30 N and the other with 5 N. What is the net (total) force on the box, in newtons?
24. 24.⚙️ Which simple machine is a screw jack? (a) screw (b) wedge (c) inclined plane (d) pulley
25. 25.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) on the fulcrum (c) far from the fulcrum (d) near the fulcrum
26. 26.💪 A bag has a mass of 12 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
27. 27.⚖️ A lever bar balances. The load is 350 N at ? cm from the fulcrum. The effort is 210 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 9 N, a carpet 12 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
30. 30.True or false: drawing up a well bucket is a pull. (a) False (b) True
31. 31.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 80 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
33. 33.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 200 N bucket on the axle, in newtons? (ideal)
34. 34.🪝 A load of 560 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
35. 35.🔍 Which is the odd one out? (a) a nutcracker (b) a bottle opener (c) a wood screw (d) a crowbar
36. 36.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
37. 37.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
38. 38.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Ravi (220 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
39. 39.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) muscular force (c) magnetic force (d) friction
40. 40.💪 A cart is pulled to the right with 70 N and to the left with 55 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force

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