Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 987 · 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: pushing a trolley is a push. (a) True (b) False
2. 2.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
3. 3.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
4. 4.🪝 A load of 180 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
5. 5.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a glass sheet 5 N, a wooden plank 7 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
7. 7.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
8. 8.True or false: closing a drawer is a pull. (a) False (b) True
9. 9.⚙️ Which simple machine is a wood screw? (a) pulley (b) wedge (c) lever (d) screw
10. 10.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
11. 11.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
12. 12.💪 Two children push a box to the right, one with 5 N and the other with 75 N. What is the net (total) force on the box, in newtons?
13. 13.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
15. 15.🪝 A pulley system lifts a 750 N load with an effort of 250 N. What is its mechanical advantage (MA)?
16. 16.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
17. 17.🪝 A load of 450 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
18. 18.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
19. 19.⚖️ A lever bar balances. The load is 240 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?
20. 20.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 120 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.💪 Which can a force NOT do? (a) change its colour (b) change its shape (c) start it moving (d) stop it moving
22. 22.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.💪 A bag has a mass of 2 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
24. 24.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
25. 25.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Asha (130 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.True or false: a wheelchair ramp is a pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a nut and bolt? (a) screw (b) wheel and axle (c) wedge (d) lever
28. 28.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
30. 30.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a loose rope (d) a sharp wedge
31. 31.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
32. 32.🪝 A pulley system lifts a 480 N load with an effort of 240 N. What is its mechanical advantage (MA)?
33. 33.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 200 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
35. 35.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
36. 36.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
37. 37.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
38. 38.🪝 A load of 100 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
40. 40.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?

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