Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 923 · 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.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
2. 2.True or false: a claw hammer on a nail is a pulley. (a) False (b) True
3. 3.True or false: pushing a swing is a push. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a chisel (c) a seesaw (d) a bottle opener
5. 5.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Kabir (570 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
7. 7.Which of these is a screw? (a) a bottle opener (b) a nutcracker (c) a water tap handle (d) a nut and bolt
8. 8.💪 Which force is at work: a compass needle turns? (a) muscular force (b) magnetic force (c) friction (d) gravity
9. 9.💪 Two children push a box to the right, one with 25 N and the other with 55 N. What is the net (total) force on the box, in newtons?
10. 10.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the pulley
11. 11.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Asha (180 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
13. 13.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 200 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.⚖️ A lever bar balances. The load is 240 N at 10 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
16. 16.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) the bar is short (d) turning effects match
17. 17.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) switch off gravity (c) use a smaller force (d) make new energy
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
19. 19.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a sharp wedge (d) a smaller rod (axle)
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on a glass sheet?
21. 21.🔍 Which is the odd one out? (a) powder on a carrom board (b) skating on ice (c) a wet tiled floor (d) a grippy rubber sole
22. 22.True or false: pulling up your socks is a push. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wheel on ball bearings (c) a tyre with deep treads (d) a rough doormat
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 90 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
25. 25.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
26. 26.True or false: a crowbar is a wheel and axle. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a seesaw (b) a round doorknob (c) a well winch handle (d) a water tap handle
28. 28.Which of these is caused by friction? (a) a magnet picks up pins (b) a rolling ball slows (c) a river flows downhill (d) a thrown ball comes down
29. 29.🛞 Why are tyres made with deep treads? (a) to go slower (b) to grip the road (c) to look nice (d) to save rubber
30. 30.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
31. 31.⚖️ 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 1 (c) class 3
32. 32.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
33. 33.💪 A box weighs 180 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a wooden plank 11 N, sandpaper 13 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
35. 35.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
36. 36.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
37. 37.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
38. 38.⚙️ Which simple machine is a well winch handle? (a) pulley (b) inclined plane (c) lever (d) wheel and axle
39. 39.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) two ramps back to back (d) a rope on a wheel
40. 40.⚖️ A lever bar balances. The load is 320 N at 10 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?

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