Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 884 · 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 is the odd one out? (a) a wood screw (b) a jar lid (c) a steering wheel (d) a screw jack
2. 2.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a box pushed on carpet (c) a tyre with deep treads (d) a rough doormat
3. 3.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a playground slide (c) a nutcracker (d) a bottle opener
4. 4.⚖️ A lever bar balances. The load is 450 N at ? cm from the fulcrum. The effort is 150 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
6. 6.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
7. 7.🪝 A pulley system lifts a 280 N load with an effort of 140 N. What is its mechanical advantage (MA)?
8. 8.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
9. 9.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
10. 10.True or false: a bottle cap is a lever. (a) True (b) False
11. 11.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
12. 12.💪 A bag has a mass of 36 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
13. 13.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Kabir (400 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.🏋️ 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?
15. 15.🪝 A bucket weighing 30 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
16. 16.💪 In a tug of war, one team pulls right with 10 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
17. 17.True or false: a fixed pulley rises with the load. (a) True (b) False
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
20. 20.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
21. 21.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
22. 22.⚖️ A lever bar balances. The load is 500 N at 30 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, ice 3 N, a wooden plank 4 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
24. 24.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
25. 25.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
26. 26.⚖️ A lever bar balances. The load is 40 N at 30 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
28. 28.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
29. 29.⚙️ Which simple machine is a water tap handle? (a) lever (b) wheel and axle (c) inclined plane (d) wedge
30. 30.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
31. 31.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) polished marble (c) ice (d) glass
32. 32.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
33. 33.True or false: plucking a mango is a push. (a) True (b) False
34. 34.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
36. 36.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
37. 37.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) less effort needed (d) the load floats
38. 38.Which of these is caused by muscular force? (a) a rolling ball slows (b) an apple falls down (c) lifting a school bag (d) a compass needle turns
39. 39.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
40. 40.⚙️ Which simple machine is a flagpole rope wheel? (a) wheel and axle (b) lever (c) inclined plane (d) pulley

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