Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 493 · 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.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
2. 2.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) muscular force (c) friction (d) gravity
3. 3.⚙️ Which simple machine is a well winch handle? (a) lever (b) wedge (c) pulley (d) wheel and axle
4. 4.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
5. 5.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
6. 6.True or false: a road up a hill is an inclined plane. (a) True (b) False
7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
8. 8.⚖️ 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
9. 9.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
10. 10.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
11. 11.🔍 Which is the odd one out? (a) a bottle cap (b) a nut and bolt (c) a jar lid (d) a knife edge
12. 12.Which of these is caused by gravity? (a) shoes grip the floor (b) brakes stop a bicycle (c) squeezing a lemon (d) a river flows downhill
13. 13.💪 Which force pulls everything towards the Earth? (a) wind (b) magnetism (c) gravity (d) friction
14. 14.🏋️ A force of 350 N did 3500 J of work. How many metres did the object move?
15. 15.True or false: a box pushed on carpet gives more friction. (a) True (b) False
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
17. 17.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
18. 18.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
20. 20.🏋️ Pushing a crate 6 m took 1140 J of work. What force was used, in newtons?
21. 21.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 3 (c) class 1
22. 22.⚖️ A lever bar balances. The load is 450 N at ? cm from the fulcrum. The effort is 200 N at 90 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: sandpaper 8 N, ice 4 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
24. 24.🏋️ A force of 410 N did 3690 J of work. How many metres did the object move?
25. 25.True or false: a fixed pulley needs effort = load. (a) True (b) False
26. 26.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Kabir (140 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
28. 28.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) True (b) False
29. 29.True or false: pushing a trolley is a push. (a) False (b) True
30. 30.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 5 N, a carpet 7 N, sandpaper 8 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
32. 32.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
33. 33.⚖️ A lever bar balances. The load is 90 N at 30 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 9 N, sandpaper 12 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
36. 36.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
37. 37.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.True or false: a tug of war is a pull. (a) True (b) False
39. 39.⚖️ A lever bar balances. The load is 60 N at 10 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
40. 40.Which of these is a screw? (a) a wheelchair ramp (b) a door stopper (c) a round doorknob (d) a bottle cap

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