Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 641 · 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: pushing a trolley is a pull. (a) True (b) False
2. 2.True or false: opening a drawer is a push. (a) True (b) False
3. 3.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
4. 4.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 5 N, sandpaper 8 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
6. 6.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) False (b) True
7. 7.⚙️ Which simple machine is a nut and bolt? (a) wheel and axle (b) screw (c) lever (d) inclined plane
8. 8.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) friction (c) magnetic force (d) gravity
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
10. 10.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
11. 11.🛞 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, a carpet 14 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
12. 12.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) unbalanced (c) gravity (d) doubled
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
14. 14.Which of these is caused by friction? (a) pedalling a cycle (b) rain falls to the ground (c) a rolling ball slows (d) squeezing a lemon
15. 15.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 30 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
17. 17.💪 In a tug of war, one team pulls left with 100 N and the other pulls right with 20 N. What is the size of the net force, in newtons?
18. 18.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) gravity (d) magnetism
19. 19.💪 Two children push a box to the right, one with 40 N and the other with 40 N. What is the net (total) force on the box, in newtons?
20. 20.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
21. 21.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
22. 22.Which of these is a pulley? (a) a wheelchair ramp (b) a playground slide (c) a window blind cord (d) a truck loading ramp
23. 23.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 8 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on a carpet than on ice?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a glass sheet 4 N, a carpet 7 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
26. 26.Which of these is caused by gravity? (a) brakes stop a bicycle (b) shoes grip the floor (c) a river flows downhill (d) a fridge magnet sticks
27. 27.⚖️ A lever bar balances. The load is 810 N at ? cm from the fulcrum. The effort is 270 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
29. 29.⚙️ Which simple machine is a seesaw? (a) wedge (b) screw (c) inclined plane (d) lever
30. 30.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
31. 31.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a flat ramp (d) a sharp wedge
32. 32.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
33. 33.🔍 Which is the odd one out? (a) a truck loading ramp (b) a wheelchair ramp (c) a road up a hill (d) a chisel
34. 34.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Ravi (510 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 1 (c) class 3
36. 36.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) a grippy rubber sole (d) a rough doormat
38. 38.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 6 (d) 10
39. 39.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Arjun (300 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?

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