Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 309 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 9 N, a glass sheet 3 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
2. 2.True or false: plucking a mango is a pull. (a) False (b) True
3. 3.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
4. 4.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) unbalanced (c) balanced (d) gravity
5. 5.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wet tiled floor (c) powder on a carrom board (d) a wheel on ball bearings
6. 6.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) far from the fulcrum (c) on the rock (d) near the fulcrum
7. 7.True or false: kicking a football is a push. (a) True (b) False
8. 8.True or false: pressing a doorbell is a push. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a bottle cap (b) a jar lid (c) a nut and bolt (d) a flagpole rope wheel
10. 10.⚙️ Which simple machine is a crowbar? (a) screw (b) wedge (c) wheel and axle (d) lever
11. 11.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) True (b) False
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
13. 13.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
14. 14.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
15. 15.⚖️ A seesaw balances. Kabir (720 N) sits 3 m from the pivot on one side; Arjun (540 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
16. 16.True or false: a tyre with deep treads gives less friction. (a) True (b) False
17. 17.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Kabir (340 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.True or false: a playground slide is an inclined plane. (a) False (b) True
19. 19.True or false: hitting a cricket ball is a push. (a) True (b) False
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 7 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) ice (d) a wooden plank
21. 21.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
22. 22.🪝 A well winch has a handle (wheel) of radius 14 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
23. 23.⚖️ A seesaw balances. Meena (760 N) sits 1 m from the pivot on one side; Kabir (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
24. 24.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) wet (d) warm
25. 25.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 1 (c) class 3
26. 26.Which of these is a lever? (a) a crane hook block (b) a water tap handle (c) a crowbar (d) a steering wheel
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a knife edge? (a) inclined plane (b) lever (c) pulley (d) wedge
29. 29.💪 Which force is at work: a compass needle turns? (a) gravity (b) friction (c) muscular force (d) magnetic force
30. 30.⚖️ A seesaw balances. Ravi (360 N) sits 2 m from the pivot on one side; Kabir (240 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
32. 32.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
34. 34.Which of these is a pulley? (a) a flagpole rope wheel (b) the tip of a nail (c) a road up a hill (d) a water tap handle
35. 35.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) turning effects match (d) both weights are equal
36. 36.True or false: a road up a hill is a pulley. (a) True (b) False
37. 37.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
38. 38.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
39. 39.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
40. 40.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 140 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?

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