Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 430 · 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.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) lever (c) inclined plane (d) pulley
2. 2.True or false: a fixed pulley halves the effort. (a) False (b) True
3. 3.⚙️ Which simple machine is a water tap handle? (a) inclined plane (b) wheel and axle (c) lever (d) screw
4. 4.🔍 Which is the odd one out? (a) a jar lid (b) a truck loading ramp (c) a bottle cap (d) a nut and bolt
5. 5.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 6 (c) 12 (d) 10
6. 6.💪 Which force is at work: a thrown ball comes down? (a) friction (b) magnetic force (c) gravity (d) muscular force
7. 7.💪 Which force is at work: squeezing a lemon? (a) friction (b) magnetic force (c) gravity (d) muscular force
8. 8.⚖️ A seesaw balances. Ravi (150 N) sits 1 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
10. 10.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
12. 12.True or false: pulling a cart is a pull. (a) True (b) False
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a carpet 7 N, sandpaper 10 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
14. 14.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) a wheel on ball bearings (d) a wet tiled floor
15. 15.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
16. 16.Which of these is caused by gravity? (a) shoes grip the floor (b) a fridge magnet sticks (c) a compass needle turns (d) rain falls to the ground
17. 17.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
18. 18.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Arjun (800 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 20 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
21. 21.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
23. 23.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
24. 24.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 1 (c) class 2
26. 26.True or false: a water tap handle is a wheel and axle. (a) True (b) False
27. 27.🪝 A load of 570 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
28. 28.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) make new energy (c) stop all friction (d) use a smaller force
29. 29.🔍 Which is the odd one out? (a) a bottle opener (b) a nutcracker (c) a seesaw (d) a chisel
30. 30.True or false: pushing a swing is a push. (a) True (b) False
31. 31.⚖️ A seesaw balances. Ravi (190 N) sits ? m from the pivot on one side; Asha (760 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
32. 32.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
33. 33.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
34. 34.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
35. 35.🏋️ A force of 190 N did 950 J of work. How many metres did the object move?
36. 36.Which of these is caused by gravity? (a) a rolling ball slows (b) brakes stop a bicycle (c) a magnet picks up pins (d) a river flows downhill
37. 37.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
38. 38.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a crowbar (c) a bottle opener (d) a steering wheel
39. 39.🪝 A load of 690 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 2 (c) class 3

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