Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 622 · 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.True or false: a claw hammer on a nail is a screw. (a) True (b) False
2. 2.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 200 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
4. 4.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) colour of bar (d) time taken
5. 5.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
6. 6.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.True or false: pulling a cart is a push. (a) False (b) True
8. 8.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 10 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.🏋️ A force of 280 N did 1960 J of work. How many metres did the object move?
10. 10.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
11. 11.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
12. 12.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
13. 13.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
14. 14.💪 A bag has a mass of 26 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
15. 15.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
17. 17.⚖️ A seesaw balances. Ravi (760 N) sits ? m from the pivot on one side; Asha (760 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 5 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
20. 20.Which of these is a lever? (a) a nutcracker (b) a wood screw (c) a bottle cap (d) a well winch handle
21. 21.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Arjun (220 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
23. 23.⚖️ A seesaw balances. Zoya (480 N) sits ? m from the pivot on one side; Meena (360 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
24. 24.💪 A force is a … (a) kind of colour (b) unit of time (c) type of sound (d) push or a pull
25. 25.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
26. 26.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
27. 27.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) False (b) True
28. 28.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) both weights are equal (d) the bar is short
29. 29.💪 Two children push a box to the right, one with 30 N and the other with 70 N. What is the net (total) force on the box, in newtons?
30. 30.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the fulcrum (d) the load
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 3 N, a wooden plank 5 N, a carpet 8 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 6 N, sandpaper 7 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
34. 34.True or false: drawing up a well bucket is a pull. (a) False (b) True
35. 35.💪 A box weighs 380 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
37. 37.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
38. 38.⚖️ A lever bar balances. The load is 320 N at 20 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
40. 40.⚖️ A seesaw balances. Kabir (300 N) sits 2 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?

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