Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 589 · 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: a fixed pulley rises with the load. (a) True (b) False
2. 2.🏋️ A force of 480 N did 3840 J of work. How many metres did the object move?
3. 3.💪 A cart is pulled to the right with 85 N and to the left with 95 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
4. 4.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
5. 5.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
6. 6.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the axle (d) the effort
7. 7.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
9. 9.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
10. 10.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
12. 12.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) nothing
13. 13.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
14. 14.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
15. 15.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
16. 16.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
17. 17.True or false: a wet tiled floor gives more friction. (a) True (b) False
18. 18.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 2 (c) class 3
19. 19.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
20. 20.💪 Which force is at work: a river flows downhill? (a) muscular force (b) gravity (c) friction (d) magnetic force
21. 21.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
22. 22.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
23. 23.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
24. 24.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, ice 3 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
26. 26.🪝 A load of 280 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
27. 27.True or false: pushing a trolley is a push. (a) False (b) True
28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
29. 29.True or false: sand on a slippery path gives less friction. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a wet tiled floor (b) a wheel on ball bearings (c) a tyre with deep treads (d) skating on ice
31. 31.💪 In a tug of war, one team pulls right with 55 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
32. 32.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
33. 33.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 2 (c) class 3
34. 34.⚙️ Which simple machine is a steering wheel? (a) lever (b) wheel and axle (c) inclined plane (d) pulley
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
36. 36.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) time taken (d) colour of bar
37. 37.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
38. 38.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) oil the moving parts (d) add sand
39. 39.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
40. 40.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull

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