Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 101 · 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.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
2. 2.⚙️ Which simple machine is a seesaw? (a) pulley (b) wheel and axle (c) inclined plane (d) lever
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
4. 4.True or false: a movable pulley only changes direction. (a) False (b) True
5. 5.True or false: your forearm is a class 2 lever (load in the middle). (a) True (b) False
6. 6.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to go slower (d) to grip the road
7. 7.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
8. 8.🪝 A load of 680 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
9. 9.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
10. 10.🛞 Friction acts … (a) with the motion (b) against the motion (c) only on ice (d) only upwards
11. 11.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
12. 12.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
13. 13.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
14. 14.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
15. 15.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
16. 16.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) warm (d) wet
17. 17.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
19. 19.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
20. 20.Which of these is a screw? (a) a claw hammer on a nail (b) a wood screw (c) a well-bucket rope wheel (d) a well winch handle
21. 21.True or false: pushing a trolley is a pull. (a) False (b) True
22. 22.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 9 N, a glass sheet 4 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
24. 24.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
25. 25.🏋️ A force of 360 N pushes a cart 4 m along the floor. How much work is done, in joules?
26. 26.🪝 A load of 900 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
27. 27.Which of these is a lever? (a) a jar lid (b) a screw jack (c) a seesaw (d) a water tap handle
28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 30 cm and the load at 90 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
30. 30.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 360 N bucket on the axle, in newtons? (ideal)
32. 32.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
33. 33.🔍 Which is the odd one out? (a) a bottle opener (b) a bottle cap (c) a jar lid (d) a nut and bolt
34. 34.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
35. 35.True or false: a truck loading ramp is a screw. (a) True (b) False
36. 36.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
37. 37.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
38. 38.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
39. 39.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 400 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a nutcracker (d) a bottle cap

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