Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 910 · 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.Which of these is a wedge? (a) a water tap handle (b) a door stopper (c) a nutcracker (d) a nut and bolt
2. 2.⚙️ Which simple machine is a chisel? (a) wedge (b) wheel and axle (c) inclined plane (d) lever
3. 3.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the axle (c) the load (d) the fulcrum
4. 4.💪 In a tug of war, one team pulls left with 25 N and the other pulls right with 20 N. What is the size of the net force, in newtons?
5. 5.🔍 Which is the odd one out? (a) a playground slide (b) a nutcracker (c) a wheelchair ramp (d) a truck loading ramp
6. 6.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Arjun (640 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
8. 8.True or false: a wood screw is a lever. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) oil on a squeaky hinge (d) a wet tiled floor
10. 10.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to look nice (d) to go slower
11. 11.True or false: a tyre with deep treads gives less friction. (a) True (b) False
12. 12.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
13. 13.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) unbalanced (c) gravity (d) doubled
14. 14.🛞 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 10 N, a glass sheet 4 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 2 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
16. 16.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
17. 17.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
18. 18.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
19. 19.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 2 (c) class 3
20. 20.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
21. 21.Which of these is a pulley? (a) a flagpole rope wheel (b) a knife edge (c) the tip of a nail (d) a round doorknob
22. 22.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
24. 24.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.⚖️ A seesaw balances. Asha (510 N) sits ? m from the pivot on one side; Ravi (170 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
26. 26.⚖️ 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?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 8 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 15 N, ice 4 N, a glass sheet 8 N, a wooden plank 11 N. How many newtons more were needed on a carpet than on ice?
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.💪 Which can a force NOT do? (a) change its shape (b) change its colour (c) start it moving (d) stop it moving
32. 32.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
33. 33.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) anywhere (d) farther from the pivot
34. 34.🪝 A bucket weighing 450 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
35. 35.⚙️ A screw is really … (a) a ramp wrapped round (b) a kind of wheel (c) a bent lever (d) a tiny pulley
36. 36.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
37. 37.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
38. 38.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) nothing
39. 39.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 40 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.True or false: sand on a slippery path gives more friction. (a) False (b) True

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