Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 775 · 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.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 12 (d) 3
2. 2.🔍 Which is the odd one out? (a) a wet tiled floor (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a wheel on ball bearings
3. 3.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Asha (340 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
5. 5.🪝 A pulley system lifts a 500 N load with an effort of 250 N. What is its mechanical advantage (MA)?
6. 6.🔍 Which is the odd one out? (a) a wood screw (b) a crane hook block (c) a well-bucket rope wheel (d) a flagpole rope wheel
7. 7.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 3 (c) class 2
8. 8.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
9. 9.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) switch off gravity (d) stop all friction
10. 10.Which of these is caused by friction? (a) brakes stop a bicycle (b) a river flows downhill (c) a thrown ball comes down (d) rain falls to the ground
11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
12. 12.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
13. 13.⚖️ A seesaw balances. Kabir (380 N) sits 2 m from the pivot on one side; Arjun (380 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
14. 14.Which of these is an inclined plane? (a) a door stopper (b) a crowbar (c) a truck loading ramp (d) a screw jack
15. 15.True or false: a chisel is a wheel and axle. (a) True (b) False
16. 16.True or false: sand on a slippery path gives less friction. (a) False (b) True
17. 17.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
18. 18.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) nothing
19. 19.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
20. 20.💪 A force is a … (a) type of sound (b) unit of time (c) push or a pull (d) kind of colour
21. 21.⚖️ A lever bar balances. The load is 40 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.True or false: drawing up a well bucket is a push. (a) False (b) True
23. 23.⚖️ A lever bar balances. The load is 90 N at ? cm from the fulcrum. The effort is 120 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.True or false: plucking a mango is a pull. (a) True (b) False
25. 25.🛞 How can we reduce friction in a machine? (a) add sand (b) oil the moving parts (c) press parts harder (d) make parts rough
26. 26.⚙️ Which simple machine is a jar lid? (a) wheel and axle (b) lever (c) screw (d) pulley
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 13 N, ice 4 N, a glass sheet 7 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
29. 29.🪝 A pulley system lifts a 420 N load with an effort of 140 N. What is its mechanical advantage (MA)?
30. 30.True or false: a fixed pulley rises with the load. (a) False (b) True
31. 31.🏋️ A force of 410 N pushes a cart 4 m along the floor. How much work is done, in joules?
32. 32.🏋️ A force of 130 N pushes a cart 5 m along the floor. How much work is done, in joules?
33. 33.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) False (b) True
34. 34.True or false: an axe blade is a wedge. (a) True (b) False
35. 35.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 7 N, a carpet 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
37. 37.⚖️ A lever bar balances. The load is 210 N at 20 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🪝 A well winch has a handle (wheel) of radius 25 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
39. 39.🪝 A load of 560 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.🏋️ A force of 110 N did 440 J of work. How many metres did the object move?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids