Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 436 · 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 force is at work: an apple falls down? (a) gravity (b) muscular force (c) friction (d) magnetic force
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 10 N, a glass sheet 1 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
3. 3.⚖️ A lever bar balances. The load is 480 N at 40 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
4. 4.True or false: a screw jack is a pulley. (a) True (b) False
5. 5.⚙️ Which simple machine is a bottle opener? (a) inclined plane (b) lever (c) screw (d) pulley
6. 6.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
7. 7.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) make new energy (c) switch off gravity (d) use a smaller force
8. 8.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a flagpole rope wheel (c) a window blind cord (d) a claw hammer on a nail
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 0 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
10. 10.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
11. 11.⚖️ A seesaw balances. Meena (450 N) sits 2 m from the pivot on one side; Arjun (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
12. 12.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
13. 13.⚖️ A seesaw balances. Zoya (160 N) sits 1 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the fulcrum moves (d) the bar is short
15. 15.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
16. 16.⚖️ A seesaw balances. Ravi (280 N) sits 4 m from the pivot on one side; Asha (560 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, ice 2 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
19. 19.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
20. 20.⚖️ A lever bar balances. The load is 120 N at 30 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 10 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
23. 23.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) muscular force (c) friction (d) magnetic force
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a carpet 9 N, sandpaper 12 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
25. 25.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
26. 26.🔍 Which is the odd one out? (a) an axe blade (b) a chisel (c) a round doorknob (d) a knife edge
27. 27.⚖️ A seesaw balances. Arjun (520 N) sits 4 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?
28. 28.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 280 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.⚖️ A lever bar balances. The load is 420 N at 30 cm from the fulcrum. The effort is 210 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.True or false: a tug of war is a pull. (a) False (b) True
31. 31.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
32. 32.🔍 Which is the odd one out? (a) skating on ice (b) chalk on a gym bar (c) a wheel on ball bearings (d) a wet tiled floor
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 5 N, a carpet 7 N, sandpaper 10 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
34. 34.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
35. 35.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) skating on ice (d) a tyre with deep treads
36. 36.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
37. 37.⚖️ A seesaw balances. Arjun (400 N) sits 1 m from the pivot on one side; Kabir (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
38. 38.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 6 (d) 10
39. 39.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 1 (c) class 3
40. 40.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2

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