Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 186 · 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 rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
2. 2.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
3. 3.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 1 N, a glass sheet 5 N, a wooden plank 7 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
5. 5.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) True (b) False
6. 6.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
7. 7.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 8 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
9. 9.True or false: opening a drawer is a push. (a) False (b) True
10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
11. 11.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) mass of fulcrum (d) time taken
12. 12.True or false: closing a drawer is a push. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
14. 14.True or false: a window blind cord is a pulley. (a) True (b) False
15. 15.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the fulcrum (d) the effort
16. 16.💪 A force is a … (a) kind of colour (b) push or a pull (c) type of sound (d) unit of time
17. 17.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 11 N, ice 3 N, a glass sheet 7 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
21. 21.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 2 (c) class 1
22. 22.⚖️ A seesaw balances. Asha (130 N) sits ? m from the pivot on one side; Meena (520 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
23. 23.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a box pushed on carpet (d) oil on a squeaky hinge
24. 24.Which of these is a pulley? (a) a round doorknob (b) a flagpole rope wheel (c) a chisel (d) an axe blade
25. 25.Which of these is caused by muscular force? (a) pedalling a cycle (b) an apple falls down (c) shoes grip the floor (d) rubbing hands warms them
26. 26.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a bar on a pivot (d) a rope on a wheel
27. 27.⚖️ A lever bar balances. The load is 160 N at ? cm from the fulcrum. The effort is 40 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
28. 28.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the fulcrum moves (d) the bar is short
29. 29.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a box pushed on carpet (c) powder on a carrom board (d) sand on a slippery path
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 9 N, a glass sheet 1 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
32. 32.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 11 N, ice 1 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
34. 34.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
35. 35.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
36. 36.💪 A bag has a mass of 31 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
37. 37.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Asha (180 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
38. 38.True or false: a crane hook block is a wheel and axle. (a) True (b) False
39. 39.True or false: a crowbar is a pulley. (a) False (b) True
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2

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