Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 935 · 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.True or false: a fishing rod is a class 2 lever (load in the middle). (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a grippy rubber sole (d) chalk on a gym bar
3. 3.💪 In which unit do we measure force? (a) second (s) (b) newton (N) (c) litre (L) (d) metre (m)
4. 4.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Meena (400 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.Which of these is caused by muscular force? (a) shoes grip the floor (b) rubbing hands warms them (c) a rolling ball slows (d) lifting a school bag
6. 6.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
7. 7.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
8. 8.True or false: powder on a carrom board gives less friction. (a) True (b) False
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
10. 10.Which of these is caused by gravity? (a) rain falls to the ground (b) brakes stop a bicycle (c) shoes grip the floor (d) a rolling ball slows
11. 11.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
12. 12.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) less effort needed (d) more effort needed
13. 13.⚖️ A lever bar balances. The load is 1000 N at 40 cm from the fulcrum. The effort is 400 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
16. 16.Which of these is caused by gravity? (a) an apple falls down (b) a fridge magnet sticks (c) pedalling a cycle (d) rubbing hands warms them
17. 17.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
18. 18.⚖️ A seesaw balances. Ravi (480 N) sits 3 m from the pivot on one side; Kabir (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.True or false: kicking a football is a push. (a) True (b) False
20. 20.True or false: a wood screw is a wedge. (a) False (b) True
21. 21.True or false: a smooth steel slide gives more friction. (a) True (b) False
22. 22.💪 In a tug of war, one team pulls right with 65 N and the other pulls left with 45 N. What is the size of the net force, in newtons?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
24. 24.🛞 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 11 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
25. 25.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
26. 26.⚙️ Which simple machine is a crowbar? (a) lever (b) pulley (c) wheel and axle (d) inclined plane
27. 27.🏋️ A force of 310 N pushes a cart 10 m along the floor. How much work is done, in joules?
28. 28.⚙️ Which simple machine is a door stopper? (a) screw (b) inclined plane (c) wedge (d) lever
29. 29.True or false: kicking a football is a pull. (a) True (b) False
30. 30.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 3 (c) class 2
31. 31.🪝 A load of 580 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
32. 32.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 2 (c) class 1
33. 33.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
34. 34.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
35. 35.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
36. 36.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
37. 37.⚖️ A lever bar balances. The load is 30 N at 20 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
39. 39.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
40. 40.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful

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