Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 349 · 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 jar lid is a wedge. (a) True (b) False
2. 2.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
3. 3.True or false: skating on ice gives more friction. (a) False (b) True
4. 4.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
5. 5.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 11 N, a carpet 13 N, ice 4 N, a glass sheet 8 N. How many newtons more were needed on a carpet than on ice?
7. 7.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
8. 8.💪 Which force is at work: rain falls to the ground? (a) gravity (b) magnetic force (c) muscular force (d) friction
9. 9.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a loose rope (d) a sharp wedge
10. 10.True or false: kicking a football is a pull. (a) False (b) True
11. 11.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.Which of these is caused by muscular force? (a) an apple falls down (b) lifting a school bag (c) a magnet picks up pins (d) a compass needle turns
13. 13.True or false: a bottle cap is a screw. (a) False (b) True
14. 14.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
15. 15.🪝 A bucket weighing 260 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
16. 16.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
19. 19.Which of these is a pulley? (a) a nut and bolt (b) a crowbar (c) a well-bucket rope wheel (d) a water tap handle
20. 20.Which of these is caused by gravity? (a) pedalling a cycle (b) brakes stop a bicycle (c) a river flows downhill (d) a rolling ball slows
21. 21.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a screw jack (c) a jar lid (d) a wood screw
22. 22.⚖️ 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 3 (c) class 2
23. 23.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
24. 24.🪝 A pulley system lifts a 200 N load with an effort of 100 N. What is its mechanical advantage (MA)?
25. 25.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) False (b) True
26. 26.⚖️ A lever bar balances. The load is 350 N at 20 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
28. 28.⚖️ A lever bar balances. The load is 360 N at 20 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
30. 30.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
31. 31.🔍 Which is the odd one out? (a) a water tap handle (b) an axe blade (c) the tip of a nail (d) a door stopper
32. 32.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
34. 34.Which of these is an inclined plane? (a) the tip of a nail (b) a door stopper (c) a road up a hill (d) a screw jack
35. 35.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
36. 36.🏋️ A force of 150 N did 1200 J of work. How many metres did the object move?
37. 37.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
38. 38.🪝 A load of 520 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.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) far from the fulcrum (c) on the rock (d) near the fulcrum
40. 40.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the axle

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