Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 310 · 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 river flows downhill? (a) muscular force (b) gravity (c) friction (d) magnetic force
2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
3. 3.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
4. 4.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
5. 5.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the effort (c) the load (d) nothing
6. 6.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 2 (c) class 1
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) ice
8. 8.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
9. 9.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) gravity (c) muscular force (d) friction
10. 10.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
11. 11.Which of these is caused by gravity? (a) a fridge magnet sticks (b) squeezing a lemon (c) rain falls to the ground (d) brakes stop a bicycle
12. 12.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 150 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 8 N, sandpaper 10 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
15. 15.Which of these is a pulley? (a) a water tap handle (b) a jar lid (c) a well winch handle (d) a well-bucket rope wheel
16. 16.True or false: a movable pulley needs effort = load. (a) False (b) True
17. 17.True or false: sand on a slippery path gives more friction. (a) True (b) False
18. 18.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
19. 19.⚖️ A seesaw balances. Asha (720 N) sits 3 m from the pivot on one side; Meena (540 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
20. 20.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a flat ramp (d) a sharp wedge
21. 21.⚖️ A seesaw balances. Ravi (400 N) sits 2 m from the pivot on one side; Meena (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
23. 23.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
24. 24.💪 A bag has a mass of 18 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
25. 25.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
26. 26.🪝 A load of 1040 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
27. 27.Which of these is a pulley? (a) a bottle cap (b) a steering wheel (c) a claw hammer on a nail (d) a flagpole rope wheel
28. 28.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) unbalanced (d) doubled
29. 29.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
32. 32.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
33. 33.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) a wet tiled floor (d) a grippy rubber sole
34. 34.💪 Two children push a box to the right, one with 80 N and the other with 30 N. What is the net (total) force on the box, in newtons?
35. 35.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 1 (c) class 2
36. 36.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.💪 Two children push a box to the right, one with 40 N and the other with 40 N. What is the net (total) force on the box, in newtons?
38. 38.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
40. 40.⚙️ Which simple machine is a steering wheel? (a) pulley (b) wheel and axle (c) lever (d) screw

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