Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 113 · 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 wet tiled floor? (a) less friction (b) more friction
2. 2.💪 In which unit do we measure force? (a) metre (m) (b) newton (N) (c) litre (L) (d) second (s)
3. 3.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
4. 4.True or false: pulling a cart is a push. (a) False (b) True
5. 5.⚖️ A seesaw balances. Arjun (190 N) sits 1 m from the pivot on one side; Ravi (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
6. 6.⚖️ 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 2 (c) class 3
7. 7.⚖️ A seesaw balances. Meena (400 N) sits 1 m from the pivot on one side; Kabir (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) friction (d) gravity
9. 9.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
10. 10.🔍 Which is the odd one out? (a) skating on ice (b) a wheel on ball bearings (c) chalk on a gym bar (d) a smooth steel slide
11. 11.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
13. 13.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 1 (c) class 2
14. 14.⚖️ A seesaw balances. Ravi (420 N) sits ? m from the pivot on one side; Asha (140 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
15. 15.True or false: a movable pulley halves the effort. (a) True (b) False
16. 16.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
17. 17.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Ravi (510 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.⚖️ A lever bar balances. The load is 50 N at ? cm from the fulcrum. The effort is 20 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.⚙️ Which simple machine is an axe blade? (a) wheel and axle (b) inclined plane (c) lever (d) wedge
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
21. 21.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, ice 1 N, a glass sheet 2 N, a carpet 4 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
23. 23.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
25. 25.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) True (b) False
26. 26.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
27. 27.⚖️ A lever bar balances. The load is 240 N at 20 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?
28. 28.True or false: a window blind cord is a wheel and axle. (a) True (b) False
29. 29.Which of these is caused by friction? (a) rain falls to the ground (b) a river flows downhill (c) a magnet picks up pins (d) rubbing hands warms them
30. 30.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
32. 32.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
33. 33.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Zoya (800 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
35. 35.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
36. 36.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
37. 37.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) gravity (d) balanced
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 50 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
39. 39.⚖️ A seesaw balances. Zoya (390 N) sits ? m from the pivot on one side; Asha (130 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
40. 40.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)

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