Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 666 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a wooden plank 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 4 N, sandpaper 7 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
3. 3.True or false: a wheelchair ramp is an inclined plane. (a) False (b) True
4. 4.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, ice 1 N, a wooden plank 2 N. How many newtons more were needed on sandpaper than on ice?
7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
8. 8.True or false: a flagpole rope wheel is a wedge. (a) True (b) False
9. 9.⚖️ A lever bar balances. The load is 140 N at 50 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
10. 10.🪝 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
11. 11.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
12. 12.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) skating on ice (d) a smooth steel slide
13. 13.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
14. 14.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
15. 15.💪 A cart is pulled to the right with 55 N and to the left with 40 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
17. 17.🏋️ A force of 350 N did 2800 J of work. How many metres did the object move?
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
19. 19.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) use a smaller force (d) stop all friction
20. 20.⚖️ A lever bar balances. The load is 30 N at 50 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
22. 22.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
23. 23.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
24. 24.🪝 A pulley system lifts a 240 N load with an effort of 60 N. What is its mechanical advantage (MA)?
25. 25.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 12 (c) 3 (d) 10
26. 26.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
27. 27.💪 A bag has a mass of 9 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
28. 28.True or false: a nut and bolt is a wedge. (a) True (b) False
29. 29.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
30. 30.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a sharp wedge (d) a smaller rod (axle)
31. 31.⚖️ A seesaw balances. Meena (480 N) sits ? m from the pivot on one side; Kabir (360 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
32. 32.⚙️ Which simple machine is a claw hammer on a nail? (a) wedge (b) inclined plane (c) pulley (d) lever
33. 33.🔍 Which is the odd one out? (a) a crowbar (b) a wheelchair ramp (c) a bottle opener (d) a claw hammer on a nail
34. 34.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) the fulcrum moves (d) turning effects match
35. 35.⚖️ A lever bar balances. The load is 270 N at ? cm from the fulcrum. The effort is 270 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
37. 37.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
38. 38.💪 A cart is pulled to the right with 30 N and to the left with 15 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
39. 39.True or false: a truck loading ramp is a pulley. (a) False (b) True
40. 40.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour

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