Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 222 · 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 machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
2. 2.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) time taken (d) mass of fulcrum
3. 3.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Meena (110 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.⚖️ A seesaw balances. Arjun (130 N) sits 4 m from the pivot on one side; Zoya (520 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
5. 5.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
6. 6.Which of these is a wedge? (a) a crowbar (b) a seesaw (c) a knife edge (d) a bottle opener
7. 7.💪 A bag has a mass of 20 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
8. 8.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) less effort needed (d) more effort needed
9. 9.🔍 Which is the odd one out? (a) powder on a carrom board (b) chalk on a gym bar (c) a grippy rubber sole (d) a tyre with deep treads
10. 10.True or false: an axe blade is a lever. (a) False (b) True
11. 11.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
12. 12.Which of these is a screw? (a) a claw hammer on a nail (b) a wheelchair ramp (c) a nutcracker (d) a jar lid
13. 13.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) near the fulcrum (d) on the fulcrum
14. 14.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) screw (c) lever (d) wheel and axle
15. 15.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
16. 16.⚙️ A wedge is … (a) two ramps back to back (b) a wheel on a rod (c) a bar on a pivot (d) a rope on a wheel
17. 17.⚖️ A lever bar balances. The load is 160 N at 10 cm from the fulcrum. The effort is 40 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
20. 20.🪝 A load of 160 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.⚖️ A lever bar balances. The load is 180 N at 10 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.⚙️ Which simple machine is a bottle opener? (a) lever (b) wedge (c) pulley (d) screw
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 4 N, a glass sheet 6 N, a wooden plank 8 N. How many newtons more were needed on a carpet than on ice?
24. 24.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
25. 25.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
26. 26.Which of these is a lever? (a) a flagpole rope wheel (b) a bottle opener (c) a door stopper (d) a road up a hill
27. 27.🏋️ Pushing a crate 2 m took 460 J of work. What force was used, in newtons?
28. 28.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a smooth steel slide (d) powder on a carrom board
29. 29.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
30. 30.True or false: a movable pulley rises with the load. (a) False (b) True
31. 31.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Zoya (240 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.💪 Which force pulls everything towards the Earth? (a) magnetism (b) gravity (c) friction (d) wind
33. 33.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
34. 34.⚖️ A seesaw balances. Asha (390 N) sits 3 m from the pivot on one side; Ravi (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
36. 36.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
37. 37.⚖️ Which class of lever is a lemon squeezer? (a) class 2 (b) class 3 (c) class 1
38. 38.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
39. 39.Which of these is a lever? (a) a flagpole rope wheel (b) a nutcracker (c) a road up a hill (d) a wood screw
40. 40.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem

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