Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 706 · 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 force is at work: a rolling ball slows? (a) gravity (b) magnetic force (c) muscular force (d) friction
2. 2.🔍 Which is the odd one out? (a) a seesaw (b) a bottle opener (c) a crowbar (d) a crane hook block
3. 3.True or false: a movable pulley halves the effort. (a) False (b) True
4. 4.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 3 (c) class 2
5. 5.🪝 A load of 580 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
6. 6.⚖️ What is the pivot point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
7. 7.⚖️ A seesaw balances. Kabir (170 N) sits 2 m from the pivot on one side; Zoya (340 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.True or false: a wet tiled floor gives less friction. (a) True (b) False
9. 9.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) unbalanced (d) doubled
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a carpet 10 N, sandpaper 12 N. Which surface gave the most friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
11. 11.💪 A bag has a mass of 35 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 5 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
13. 13.💪 A bag has a mass of 5 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
14. 14.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
15. 15.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
16. 16.🔍 Which is the odd one out? (a) a steering wheel (b) a round doorknob (c) a well winch handle (d) a wheelchair ramp
17. 17.💪 A box weighs 310 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
18. 18.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
19. 19.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
20. 20.🪝 A pulley system lifts a 560 N load with an effort of 280 N. What is its mechanical advantage (MA)?
21. 21.⚖️ 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?
22. 22.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) nothing (c) the fulcrum (d) the load
23. 23.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
24. 24.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Zoya (160 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.⚙️ Which simple machine is a screw jack? (a) inclined plane (b) lever (c) wheel and axle (d) screw
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
27. 27.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
29. 29.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
30. 30.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.⚙️ Which simple machine is a truck loading ramp? (a) lever (b) wedge (c) inclined plane (d) screw
32. 32.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) both weights are equal (d) turning effects match
33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
35. 35.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
36. 36.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🛞 How can we reduce friction in a machine? (a) add sand (b) make parts rough (c) press parts harder (d) oil the moving parts
38. 38.🔍 Which is the odd one out? (a) a chisel (b) a steering wheel (c) a knife edge (d) a door stopper
39. 39.💪 A bag has a mass of 33 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 80 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2

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