Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 590 · 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.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
2. 2.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) on the fulcrum (d) far from the fulcrum
3. 3.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
4. 4.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
5. 5.True or false: a fixed pulley halves the effort. (a) False (b) True
6. 6.💪 A force is a … (a) push or a pull (b) unit of time (c) type of sound (d) kind of colour
7. 7.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) more effort needed (d) the load floats
8. 8.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
9. 9.⚖️ A lever bar balances. The load is 500 N at ? cm from the fulcrum. The effort is 250 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
10. 10.True or false: a box pushed on carpet gives more friction. (a) True (b) False
11. 11.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
12. 12.True or false: a screw jack is a screw. (a) True (b) False
13. 13.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
14. 14.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
15. 15.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the effort (c) the axle (d) the fulcrum
17. 17.Which of these is a wheel and axle? (a) a water tap handle (b) a knife edge (c) a road up a hill (d) a chisel
18. 18.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
19. 19.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) time taken (d) colour of bar
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 60 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
21. 21.💪 A bag has a mass of 33 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
22. 22.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, a carpet 12 N, ice 2 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
24. 24.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
25. 25.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
26. 26.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Asha (360 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🪝 A winch has a wheel of radius 6 cm and an axle of radius 3 cm. What effort on the wheel lifts a 160 N bucket on the axle, in newtons? (ideal)
28. 28.True or false: kicking a football is a push. (a) False (b) True
29. 29.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
30. 30.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
31. 31.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
32. 32.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
33. 33.True or false: a tug of war is a push. (a) True (b) False
34. 34.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
35. 35.⚙️ Which simple machine is a well-bucket rope wheel? (a) wheel and axle (b) wedge (c) pulley (d) lever
36. 36.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 13 N, ice 4 N, a glass sheet 7 N. How many newtons more were needed on sandpaper than on ice?
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
40. 40.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load

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