Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 114 · 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 bar balances. The load is 900 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
2. 2.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
3. 3.⚖️ A seesaw balances. Meena (520 N) sits ? m from the pivot on one side; Zoya (260 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
4. 4.⚖️ A seesaw balances. Ravi (540 N) sits ? m from the pivot on one side; Kabir (180 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
5. 5.💪 A cart is pulled to the right with 20 N and to the left with 5 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
6. 6.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) sand on a slippery path (d) a grippy rubber sole
7. 7.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) colour of bar (d) distance from fulcrum
8. 8.Which of these is a wheel and axle? (a) a water tap handle (b) a wood screw (c) a claw hammer on a nail (d) a crowbar
9. 9.True or false: a movable pulley is on a flagpole top. (a) False (b) True
10. 10.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
11. 11.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
12. 12.🔍 Which is the odd one out? (a) a knife edge (b) a round doorknob (c) the tip of a nail (d) an axe blade
13. 13.True or false: a seesaw is a wedge. (a) True (b) False
14. 14.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) the fulcrum moves (d) both weights are equal
15. 15.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
16. 16.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
17. 17.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) False (b) True
18. 18.💪 A force is a … (a) push or a pull (b) kind of colour (c) type of sound (d) unit of time
19. 19.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
20. 20.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) gravity (d) friction
21. 21.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
22. 22.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.Which of these is caused by muscular force? (a) lifting a school bag (b) an apple falls down (c) rain falls to the ground (d) a thrown ball comes down
25. 25.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
26. 26.True or false: a rough doormat gives more friction. (a) False (b) True
27. 27.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) a wheel on a rod (d) two ramps back to back
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
29. 29.True or false: a well winch handle is a screw. (a) True (b) False
30. 30.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
31. 31.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
32. 32.⚖️ A seesaw balances. Asha (160 N) sits ? m from the pivot on one side; Kabir (160 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
33. 33.⚙️ Which simple machine is a claw hammer on a nail? (a) lever (b) inclined plane (c) pulley (d) wheel and axle
34. 34.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) gravity (c) unbalanced (d) doubled
35. 35.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) False (b) True
36. 36.True or false: a fixed pulley stays in one place. (a) False (b) True
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 8 N, sandpaper 12 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
38. 38.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
39. 39.True or false: a road up a hill is a pulley. (a) False (b) True
40. 40.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?

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