Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 963 · 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 simple machine is a bottle cap? (a) wedge (b) lever (c) pulley (d) screw
2. 2.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
3. 3.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a smooth steel slide (c) sand on a slippery path (d) a wet tiled floor
4. 4.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) cold (d) warm
5. 5.🏋️ Pushing a crate 5 m took 2450 J of work. What force was used, in newtons?
6. 6.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
7. 7.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Asha (110 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
8. 8.⚖️ 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 3 (c) class 2
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
10. 10.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) far from the fulcrum (d) near the fulcrum
11. 11.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) sand on a slippery path (d) a smooth steel slide
12. 12.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) doubled (c) unbalanced (d) balanced
13. 13.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) True (b) False
14. 14.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
15. 15.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
16. 16.⚖️ A seesaw balances. Kabir (300 N) sits ? m from the pivot on one side; Zoya (150 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
17. 17.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the effort (c) nothing (d) the fulcrum
18. 18.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) powder on a carrom board (d) a box pushed on carpet
19. 19.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
20. 20.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
21. 21.⚖️ A seesaw balances. Kabir (450 N) sits ? m from the pivot on one side; Meena (300 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
22. 22.💪 A bag has a mass of 41 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
23. 23.⚖️ A seesaw balances. Zoya (540 N) sits 2 m from the pivot on one side; Kabir (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
24. 24.True or false: a grippy rubber sole gives less friction. (a) False (b) True
25. 25.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the axle (c) the load (d) the fulcrum
26. 26.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
27. 27.True or false: a fixed pulley only changes direction. (a) True (b) False
28. 28.⚙️ Which simple machine is a crowbar? (a) wheel and axle (b) lever (c) wedge (d) screw
29. 29.True or false: a movable pulley stays in one place. (a) True (b) False
30. 30.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) oil the moving parts (d) press parts harder
31. 31.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
32. 32.⚖️ A seesaw balances. Kabir (190 N) sits ? m from the pivot on one side; Ravi (760 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
33. 33.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) mass of fulcrum (d) time taken
34. 34.⚖️ A lever bar balances. The load is 50 N at 20 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.⚖️ 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 3 (c) class 1
36. 36.🪝 A load of 440 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the colour of rope (d) the direction of pull
38. 38.💪 Two children push a box to the right, one with 45 N and the other with 15 N. What is the net (total) force on the box, in newtons?
39. 39.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
40. 40.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) a river flows downhill (c) lifting a school bag (d) pedalling a cycle

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