Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 45 · 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.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
2. 2.⚖️ A seesaw balances. Zoya (140 N) sits 1 m from the pivot on one side; Kabir (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.True or false: a wet tiled floor gives less friction. (a) True (b) False
4. 4.💪 A force is a … (a) type of sound (b) kind of colour (c) unit of time (d) push or a pull
5. 5.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
6. 6.Which of these is a screw? (a) a truck loading ramp (b) a seesaw (c) a nutcracker (d) a nut and bolt
7. 7.Which of these is a lever? (a) a steering wheel (b) the tip of a nail (c) a crowbar (d) a round doorknob
8. 8.💪 Which force is at work: rubbing hands warms them? (a) friction (b) muscular force (c) gravity (d) magnetic force
9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
10. 10.🪝 A pulley system lifts a 180 N load with an effort of 60 N. What is its mechanical advantage (MA)?
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 9 N, sandpaper 11 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
12. 12.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
13. 13.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) skating on ice (d) a box pushed on carpet
14. 14.🪝 A load of 360 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
15. 15.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) a tyre with deep treads (d) a grippy rubber sole
16. 16.Which of these is a wedge? (a) a seesaw (b) a well-bucket rope wheel (c) a bottle cap (d) the tip of a nail
17. 17.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) muscular force (c) gravity (d) friction
18. 18.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the load (c) the effort (d) the fulcrum
19. 19.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
20. 20.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the fulcrum (c) the effort (d) the load
21. 21.⚙️ Which simple machine is a round doorknob? (a) inclined plane (b) screw (c) lever (d) wheel and axle
22. 22.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
23. 23.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
24. 24.⚖️ A seesaw balances. Asha (560 N) sits 2 m from the pivot on one side; Arjun (280 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
25. 25.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
26. 26.⚖️ A lever bar balances. The load is 30 N at ? cm from the fulcrum. The effort is 30 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
28. 28.💪 A box weighs 570 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
29. 29.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
30. 30.⚖️ A seesaw balances. Meena (390 N) sits ? m from the pivot on one side; Ravi (260 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
31. 31.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
32. 32.True or false: a steering wheel is a wheel and axle. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) skating on ice (c) powder on a carrom board (d) a rough doormat
34. 34.⚙️ Which simple machine is a playground slide? (a) wheel and axle (b) inclined plane (c) pulley (d) screw
35. 35.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
37. 37.⚖️ A lever bar balances. The load is 270 N at ? cm from the fulcrum. The effort is 180 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on a glass sheet?
39. 39.True or false: plucking a mango is a push. (a) True (b) False
40. 40.🪝 A load of 600 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)

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