Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 522 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 4 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
2. 2.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
3. 3.⚙️ Which simple machine is a claw hammer on a nail? (a) inclined plane (b) pulley (c) lever (d) wedge
4. 4.⚖️ A seesaw balances. Ravi (450 N) sits 2 m from the pivot on one side; Kabir (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
5. 5.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) a box pushed on carpet (d) skating on ice
6. 6.🪝 A bucket weighing 130 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
8. 8.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
9. 9.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) nothing (c) the load (d) the fulcrum
10. 10.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
11. 11.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
12. 12.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
13. 13.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
14. 14.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 2 (c) class 3
15. 15.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
17. 17.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
18. 18.⚖️ A lever bar balances. The load is 810 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.🛞 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 carpet 11 N, sandpaper 13 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
20. 20.🪝 A pulley system lifts an 800 N load with an effort of 200 N. What is its mechanical advantage (MA)?
21. 21.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) muscular force (c) gravity (d) friction
22. 22.💪 Which force is at work: a fridge magnet sticks? (a) magnetic force (b) gravity (c) muscular force (d) friction
23. 23.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.⚙️ A screw is really … (a) a tiny pulley (b) a bent lever (c) a kind of wheel (d) a ramp wrapped round
25. 25.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
26. 26.🔍 Which is the odd one out? (a) an axe blade (b) a nutcracker (c) the tip of a nail (d) a chisel
27. 27.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) friction (d) wind
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 70 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
31. 31.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
32. 32.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) gravity (c) balanced (d) doubled
33. 33.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) False (b) True
34. 34.Which of these is an inclined plane? (a) a bottle opener (b) a well-bucket rope wheel (c) a playground slide (d) a crowbar
35. 35.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
36. 36.💪 A force is a … (a) kind of colour (b) type of sound (c) push or a pull (d) unit of time
37. 37.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) stop all friction (c) use a smaller force (d) switch off gravity
38. 38.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
39. 39.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
40. 40.⚙️ Which simple machine is a screw jack? (a) pulley (b) screw (c) wedge (d) wheel and axle

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