Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 10 · 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 of these is a lever? (a) a water tap handle (b) a playground slide (c) a nut and bolt (d) a nutcracker
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 1 N, a wooden plank 4 N, a carpet 5 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
3. 3.True or false: pushing a swing is a pull. (a) True (b) False
4. 4.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
5. 5.💪 A box weighs 330 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
6. 6.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Zoya (480 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.True or false: a pair of scissors is a class 2 lever (load in the middle). (a) False (b) True
8. 8.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
9. 9.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) glass (d) ice
10. 10.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
11. 11.🪝 A load of 200 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 2 N, a carpet 3 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
13. 13.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
14. 14.🔍 Which is the odd one out? (a) a rough doormat (b) skating on ice (c) a smooth steel slide (d) oil on a squeaky hinge
15. 15.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) time taken (d) mass of fulcrum
16. 16.💪 A bag has a mass of 8 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
17. 17.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) magnetic force (c) friction (d) gravity
18. 18.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
19. 19.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
20. 20.⚙️ Which simple machine is a window blind cord? (a) wheel and axle (b) pulley (c) screw (d) lever
21. 21.True or false: a crowbar is a class 2 lever (load in the middle). (a) False (b) True
22. 22.⚖️ A seesaw balances. Kabir (540 N) sits 2 m from the pivot on one side; Meena (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.🪝 A pulley system lifts a 450 N load with an effort of 150 N. What is its mechanical advantage (MA)?
24. 24.⚖️ A seesaw balances. Kabir (760 N) sits ? m from the pivot on one side; Meena (760 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
25. 25.Which of these is a pulley? (a) a round doorknob (b) a steering wheel (c) a flagpole rope wheel (d) an axe blade
26. 26.⚖️ A lever bar balances. The load is 120 N at 50 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.⚙️ Which simple machine is a claw hammer on a nail? (a) screw (b) pulley (c) lever (d) wheel and axle
28. 28.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) oil the moving parts (d) press parts harder
29. 29.⚙️ Which simple machine is a flagpole rope wheel? (a) screw (b) pulley (c) wedge (d) inclined plane
30. 30.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 30 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.🔍 Which is the odd one out? (a) a wood screw (b) a round doorknob (c) a screw jack (d) a bottle cap
32. 32.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
33. 33.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
34. 34.🪝 A bucket weighing 150 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
35. 35.🛞 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 8 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
36. 36.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (100 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
38. 38.True or false: pressing a doorbell is a push. (a) False (b) True
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 8 N, sandpaper 9 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
40. 40.💪 A box weighs 380 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?

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