Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 185 · 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 claw hammer on a nail (b) a seesaw (c) a crowbar (d) a crane hook block
2. 2.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
3. 3.True or false: pressing a doorbell is a push. (a) False (b) True
4. 4.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
5. 5.True or false: drawing up a well bucket is a push. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) chalk on a gym bar (d) a wet tiled floor
7. 7.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a truck loading ramp (c) a road up a hill (d) a bottle opener
8. 8.⚖️ A lever bar balances. The load is 150 N at 50 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.True or false: hitting a cricket ball is a push. (a) False (b) True
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 7 N, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
11. 11.💪 A box weighs 410 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
12. 12.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
13. 13.⚙️ Which simple machine is a window blind cord? (a) pulley (b) wedge (c) inclined plane (d) lever
14. 14.🏋️ A force of 470 N pushes a cart 5 m along the floor. How much work is done, in joules?
15. 15.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
16. 16.True or false: skating on ice gives less friction. (a) True (b) False
17. 17.True or false: sand on a slippery path gives more friction. (a) True (b) False
18. 18.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
19. 19.⚖️ A seesaw balances. Asha (480 N) sits 2 m from the pivot on one side; Meena (320 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
20. 20.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
21. 21.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) True (b) False
22. 22.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 100 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
24. 24.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
25. 25.⚖️ A seesaw balances. Ravi (160 N) sits ? m from the pivot on one side; Zoya (320 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
26. 26.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
27. 27.Which of these is a pulley? (a) a water tap handle (b) a flagpole rope wheel (c) a round doorknob (d) a nut and bolt
28. 28.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
29. 29.⚖️ A seesaw balances. Ravi (160 N) sits 3 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a box pushed on carpet (d) a wheel on ball bearings
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, ice 3 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
32. 32.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the effort (c) the fulcrum (d) the load
33. 33.⚖️ A lever bar balances. The load is 100 N at 10 cm from the fulcrum. The effort is 10 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 11 N. How many newtons more were needed on sandpaper than on a glass sheet?
36. 36.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
37. 37.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) anywhere (d) farther from the pivot
38. 38.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 60 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
40. 40.Which of these is caused by muscular force? (a) lifting a school bag (b) an apple falls down (c) a fridge magnet sticks (d) a magnet picks up pins

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