Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 167 · 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.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a rough doormat (d) skating on ice
2. 2.True or false: a screw jack is a screw. (a) False (b) True
3. 3.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
4. 4.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
5. 5.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
6. 6.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
8. 8.True or false: pulling a cart is a push. (a) True (b) False
9. 9.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
10. 10.💪 Two children push a box to the right, one with 20 N and the other with 90 N. What is the net (total) force on the box, in newtons?
11. 11.⚙️ Which simple machine is an axe blade? (a) wheel and axle (b) screw (c) wedge (d) inclined plane
12. 12.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
13. 13.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) farther from the pivot (d) anywhere
14. 14.True or false: a fixed pulley rises with the load. (a) True (b) False
15. 15.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 240 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, ice 1 N, a glass sheet 2 N. How many newtons more were needed on a carpet than on ice?
17. 17.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
18. 18.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) press parts harder (d) make parts rough
19. 19.Which of these is caused by friction? (a) squeezing a lemon (b) a rolling ball slows (c) a thrown ball comes down (d) a compass needle turns
20. 20.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum
21. 21.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) stop all friction (c) switch off gravity (d) make new energy
22. 22.🪝 What does a single fixed pulley change? (a) gravity (b) the direction of pull (c) the size of the load (d) the colour of rope
23. 23.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
24. 24.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
25. 25.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.🏋️ A force of 350 N did 3150 J of work. How many metres did the object move?
27. 27.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) the bar is short (d) both weights are equal
28. 28.🪝 A bucket weighing 440 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
29. 29.True or false: a door stopper is a screw. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a rough doormat (c) a grippy rubber sole (d) a box pushed on carpet
31. 31.🪝 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)
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 30 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
33. 33.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
34. 34.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) wind (d) magnetism
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
36. 36.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
37. 37.True or false: kicking a football is a pull. (a) False (b) True
38. 38.🪝 A winch has a wheel of radius 8 cm and an axle of radius 4 cm. What effort on the wheel lifts a 100 N bucket on the axle, in newtons? (ideal)
39. 39.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
40. 40.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a box pushed on carpet (d) a smooth steel slide

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