Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 914 · 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.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the axle (d) the load
2. 2.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
3. 3.🪝 A pulley system lifts a 330 N load with an effort of 110 N. What is its mechanical advantage (MA)?
4. 4.⚙️ Which simple machine is a jar lid? (a) lever (b) inclined plane (c) screw (d) pulley
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
6. 6.⚙️ Which simple machine is a seesaw? (a) lever (b) inclined plane (c) screw (d) wedge
7. 7.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
8. 8.💪 A force is a … (a) kind of colour (b) push or a pull (c) unit of time (d) type of sound
9. 9.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
10. 10.True or false: a fishing rod is a class 2 lever (load in the middle). (a) True (b) False
11. 11.True or false: a chisel is a pulley. (a) False (b) True
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 10 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
13. 13.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
14. 14.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
15. 15.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) polished marble (d) ice
16. 16.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 150 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) friction (c) gravity (d) muscular force
18. 18.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
19. 19.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) pulley (c) wheel and axle (d) wedge
20. 20.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 30 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.⚙️ Which simple machine is a well-bucket rope wheel? (a) pulley (b) wheel and axle (c) wedge (d) lever
22. 22.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
23. 23.True or false: a window blind cord is a pulley. (a) False (b) True
24. 24.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
25. 25.Which of these is a wheel and axle? (a) a well winch handle (b) a truck loading ramp (c) a bottle opener (d) a window blind cord
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a glass sheet 7 N, a wooden plank 9 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
27. 27.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) colour of bar (d) distance from fulcrum
28. 28.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
29. 29.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 70 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
31. 31.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) a tyre with deep treads (d) a box pushed on carpet
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
33. 33.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) near the fulcrum (c) on the rock (d) on the fulcrum
34. 34.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
35. 35.⚖️ A lever bar balances. The load is 400 N at 10 cm from the fulcrum. The effort is 40 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ A force of 20 N did 160 J of work. How many metres did the object move?
37. 37.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) press parts harder (d) oil the moving parts
38. 38.⚖️ A lever bar balances. The load is 630 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
40. 40.💪 Which force is at work: an apple falls down? (a) gravity (b) magnetic force (c) muscular force (d) friction

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