Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 564 · 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.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) anywhere (c) on the pivot (d) farther from the pivot
2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
3. 3.💪 A bag has a mass of 46 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
4. 4.🔍 Which is the odd one out? (a) a road up a hill (b) a chisel (c) an axe blade (d) the tip of a nail
5. 5.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
6. 6.Which of these is a lever? (a) a nutcracker (b) an axe blade (c) a window blind cord (d) a round doorknob
7. 7.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) mass of fulcrum (d) colour of bar
8. 8.💪 A force is a … (a) unit of time (b) type of sound (c) kind of colour (d) push or a pull
9. 9.⚙️ Which simple machine is a well winch handle? (a) inclined plane (b) wedge (c) wheel and axle (d) pulley
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 60 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
11. 11.⚖️ A lever bar balances. The load is 30 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
12. 12.⚖️ A seesaw balances. Meena (120 N) sits 3 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
13. 13.🔍 Which is the odd one out? (a) a knife edge (b) a flagpole rope wheel (c) an axe blade (d) the tip of a nail
14. 14.🪝 A bucket weighing 110 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
15. 15.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
16. 16.⚖️ A seesaw balances. Zoya (220 N) sits 3 m from the pivot on one side; Arjun (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
18. 18.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 360 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
20. 20.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 100 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.Which of these is caused by gravity? (a) a rolling ball slows (b) rubbing hands warms them (c) shoes grip the floor (d) an apple falls down
22. 22.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) turning effects match (d) the bar is short
23. 23.True or false: pulling a cart is a pull. (a) False (b) True
24. 24.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) change its colour (d) stop it moving
25. 25.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the pulley
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
27. 27.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
28. 28.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Zoya (120 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
30. 30.🛞 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. How many newtons more were needed on sandpaper than on ice?
31. 31.⚙️ Which simple machine is a bottle opener? (a) screw (b) wheel and axle (c) lever (d) wedge
32. 32.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
34. 34.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 50 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
36. 36.True or false: a movable pulley halves the effort. (a) False (b) True
37. 37.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, sandpaper 8 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
39. 39.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
40. 40.Which of these is caused by muscular force? (a) squeezing a lemon (b) a rolling ball slows (c) an apple falls down (d) rubbing hands warms them

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