Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 403 · 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 well winch handle is a wheel and axle. (a) True (b) False
2. 2.True or false: a crowbar is an inclined plane. (a) False (b) True
3. 3.True or false: a road up a hill is a wheel and axle. (a) False (b) True
4. 4.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
5. 5.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the load (c) the effort (d) the fulcrum
6. 6.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) a box pushed on carpet (d) a smooth steel slide
7. 7.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
8. 8.⚖️ A lever bar balances. The load is 240 N at 20 cm from the fulcrum. The effort is 160 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 10 N, ice 2 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a carpet
10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
11. 11.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 120 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.Which of these is a lever? (a) an axe blade (b) a round doorknob (c) a seesaw (d) a well winch handle
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 3 N, a carpet 6 N, sandpaper 8 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
15. 15.⚖️ 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
16. 16.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
17. 17.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a kind of wheel (d) a ramp wrapped round
18. 18.🪝 A bucket weighing 480 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
19. 19.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
20. 20.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 6 (d) 10
21. 21.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a bar on a pivot (d) a rope on a wheel
22. 22.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 12 N, ice 4 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
24. 24.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
25. 25.Which of these is a lever? (a) a chisel (b) a screw jack (c) a claw hammer on a nail (d) a door stopper
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 8 N, ice 2 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, sandpaper 11 N, ice 4 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
28. 28.True or false: a road up a hill is an inclined plane. (a) True (b) False
29. 29.⚖️ A seesaw balances. Meena (520 N) sits 4 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
31. 31.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
32. 32.🏋️ A force of 310 N did 2170 J of work. How many metres did the object move?
33. 33.True or false: pulling a cart is a pull. (a) True (b) False
34. 34.🏋️ A force of 420 N did 3360 J of work. How many metres did the object move?
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
36. 36.⚖️ A lever bar balances. The load is 240 N at 40 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
37. 37.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
38. 38.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
39. 39.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
40. 40.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)

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