Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 655 · 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 surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
2. 2.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
4. 4.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) a wheel on ball bearings (d) skating on ice
5. 5.⚙️ Which simple machine is a crane hook block? (a) screw (b) wheel and axle (c) pulley (d) inclined plane
6. 6.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
7. 7.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
8. 8.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) the bar is short (d) turning effects match
9. 9.🛞 Friction acts … (a) only on ice (b) with the motion (c) only upwards (d) against the motion
10. 10.⚖️ A seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Arjun (480 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
11. 11.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Arjun (570 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.💪 A force is a … (a) type of sound (b) push or a pull (c) kind of colour (d) unit of time
13. 13.🏋️ A force of 340 N did 1360 J of work. How many metres did the object move?
14. 14.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 30 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
16. 16.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
18. 18.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
19. 19.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 90 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
21. 21.⚖️ A seesaw balances. Arjun (260 N) sits ? m from the pivot on one side; Zoya (520 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
22. 22.⚖️ A lever bar balances. The load is 810 N at 20 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.True or false: a smooth steel slide gives less friction. (a) True (b) False
24. 24.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.True or false: a fixed pulley only changes direction. (a) False (b) True
26. 26.⚖️ A seesaw balances. Kabir (200 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?
27. 27.True or false: the tip of a nail is a wedge. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a bottle opener (b) a window blind cord (c) a seesaw (d) a crowbar
29. 29.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
30. 30.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) time taken (d) mass of fulcrum
31. 31.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
32. 32.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 90 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
33. 33.⚙️ Which simple machine is a well winch handle? (a) wedge (b) wheel and axle (c) lever (d) pulley
34. 34.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 100 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) add sand (d) press parts harder
36. 36.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
37. 37.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
38. 38.True or false: drawing up a well bucket is a push. (a) True (b) False
39. 39.True or false: a tyre with deep treads gives more friction. (a) False (b) True
40. 40.🏋️ A force of 20 N did 140 J of work. How many metres did the object move?

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