Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 759 · 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 is the odd one out? (a) a road up a hill (b) a wheelchair ramp (c) a well winch handle (d) a truck loading ramp
2. 2.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 1 (c) class 2
3. 3.⚖️ A lever bar balances. The load is 280 N at ? cm from the fulcrum. The effort is 140 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
4. 4.🏋️ A force of 440 N pushes a cart 6 m along the floor. How much work is done, in joules?
5. 5.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 50 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
7. 7.Which of these is a wheel and axle? (a) an axe blade (b) a seesaw (c) a round doorknob (d) a nutcracker
8. 8.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short
9. 9.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
10. 10.True or false: a movable pulley needs effort = load. (a) True (b) False
11. 11.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 1 (c) class 3
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a wooden plank 8 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
14. 14.⚖️ A lever bar balances. The load is 250 N at 30 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.True or false: a seesaw is a class 3 lever (effort in the middle). (a) True (b) False
16. 16.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) False (b) True
17. 17.⚖️ A seesaw balances. Asha (600 N) sits ? m from the pivot on one side; Zoya (150 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
18. 18.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
19. 19.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 60 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
21. 21.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) colour of bar (d) mass of fulcrum
22. 22.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) chalk on a gym bar (d) powder on a carrom board
23. 23.🪝 A load of 400 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
24. 24.💪 A box weighs 90 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
25. 25.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a grippy rubber sole (c) a tyre with deep treads (d) skating on ice
26. 26.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
27. 27.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) chalk on a gym bar (d) skating on ice
28. 28.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 2 (c) class 1
29. 29.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
30. 30.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
31. 31.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
32. 32.💪 A bag has a mass of 54 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
33. 33.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 1520 N bucket on the axle, in newtons? (ideal)
35. 35.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
36. 36.True or false: plucking a mango is a push. (a) False (b) True
37. 37.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
38. 38.⚖️ A lever bar balances. The load is 90 N at 10 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a smooth steel slide (c) sand on a slippery path (d) a tyre with deep treads
40. 40.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1

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