Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 61 · 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.True or false: closing a drawer is a push. (a) True (b) False
2. 2.Which of these is caused by gravity? (a) brakes stop a bicycle (b) a magnet picks up pins (c) rubbing hands warms them (d) a river flows downhill
3. 3.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
4. 4.⚙️ Which simple machine is a well-bucket rope wheel? (a) pulley (b) wheel and axle (c) wedge (d) lever
5. 5.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
6. 6.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
7. 7.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
8. 8.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) litre (L) (d) newton (N)
9. 9.💪 A box weighs 460 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
10. 10.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 50 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.🪝 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)
12. 12.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
13. 13.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
15. 15.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
16. 16.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a sharp wedge (d) a loose rope
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
18. 18.⚖️ A lever bar balances. The load is 240 N at 10 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) gravity (c) magnetic force (d) friction
20. 20.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 270 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
22. 22.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a box pushed on carpet (c) skating on ice (d) a wet tiled floor
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 80 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
25. 25.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 540 N bucket on the axle, in newtons? (ideal)
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
27. 27.⚙️ Which simple machine is a wood screw? (a) lever (b) wheel and axle (c) pulley (d) screw
28. 28.💪 Which can a force NOT do? (a) change its shape (b) change its colour (c) stop it moving (d) start it moving
29. 29.🪝 A bucket weighing 500 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.🪝 A bucket weighing 250 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
31. 31.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
32. 32.True or false: pulling a cart is a push. (a) False (b) True
33. 33.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
34. 34.True or false: a movable pulley halves the effort. (a) False (b) True
35. 35.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
36. 36.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the load (c) the effort (d) the fulcrum
37. 37.🪝 A well winch has a handle (wheel) of radius 14 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
38. 38.💪 A box weighs 590 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
39. 39.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?

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