Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 21 · 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.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) on the fulcrum (d) near the fulcrum
3. 3.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Meena (400 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
5. 5.💪 Which force is at work: lifting a school bag? (a) friction (b) gravity (c) magnetic force (d) muscular force
6. 6.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
7. 7.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 8 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
9. 9.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 10 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
10. 10.🔍 Which is the odd one out? (a) a wet tiled floor (b) sand on a slippery path (c) a tyre with deep treads (d) a rough doormat
11. 11.💪 A force is a … (a) unit of time (b) type of sound (c) push or a pull (d) kind of colour
12. 12.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) both weights are equal (d) the bar is short
13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
14. 14.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
15. 15.💪 Which force is at work: a rolling ball slows? (a) gravity (b) magnetic force (c) muscular force (d) friction
16. 16.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 1 (c) class 3
17. 17.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
18. 18.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
20. 20.True or false: a door stopper is a wedge. (a) False (b) True
21. 21.⚙️ Which simple machine is an axe blade? (a) wheel and axle (b) inclined plane (c) lever (d) wedge
22. 22.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the effort (c) the pulley (d) the fulcrum
23. 23.True or false: drawing up a well bucket is a push. (a) True (b) False
24. 24.🏋️ A force of 210 N pushes a cart 7 m along the floor. How much work is done, in joules?
25. 25.True or false: a movable pulley rises with the load. (a) False (b) True
26. 26.True or false: pulling up your socks is a push. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) skating on ice (b) a box pushed on carpet (c) oil on a squeaky hinge (d) a wet tiled floor
28. 28.⚖️ A lever bar balances. The load is 320 N at ? cm from the fulcrum. The effort is 80 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Zoya (150 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.True or false: a steering wheel is a pulley. (a) True (b) False
31. 31.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 3 (c) class 2
32. 32.True or false: plucking a mango is a push. (a) True (b) False
33. 33.🪝 A load of 760 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
35. 35.True or false: a wet tiled floor gives more friction. (a) True (b) False
36. 36.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
37. 37.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3
38. 38.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) a smooth steel slide (d) chalk on a gym bar
39. 39.🪝 A pulley system lifts an 870 N load with an effort of 290 N. What is its mechanical advantage (MA)?
40. 40.True or false: a well-bucket rope wheel is a pulley. (a) True (b) False

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