Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 806 · 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 of these is a wheel and axle? (a) a truck loading ramp (b) a claw hammer on a nail (c) a water tap handle (d) a jar lid
2. 2.True or false: hitting a cricket ball is a pull. (a) False (b) True
3. 3.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
4. 4.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
5. 5.True or false: a movable pulley only changes direction. (a) True (b) False
6. 6.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
7. 7.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
8. 8.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
9. 9.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
10. 10.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
11. 11.⚙️ Which simple machine is a bottle cap? (a) pulley (b) screw (c) wheel and axle (d) lever
12. 12.🪝 A pulley system lifts a 240 N load with an effort of 80 N. What is its mechanical advantage (MA)?
13. 13.⚖️ A lever bar balances. The load is 120 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
15. 15.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) turning effects match (d) the fulcrum moves
16. 16.Which of these is caused by magnetic force? (a) shoes grip the floor (b) rubbing hands warms them (c) a magnet picks up pins (d) pedalling a cycle
17. 17.⚙️ A screw is really … (a) a kind of wheel (b) a ramp wrapped round (c) a tiny pulley (d) a bent lever
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
19. 19.⚖️ A lever bar balances. The load is 630 N at ? cm from the fulcrum. The effort is 450 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.🛞 Friction acts … (a) against the motion (b) only upwards (c) with the motion (d) only on ice
21. 21.⚖️ A seesaw balances. Kabir (680 N) sits 4 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🏋️ A force of 370 N did 3700 J of work. How many metres did the object move?
23. 23.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 450 N bucket on the axle, in newtons? (ideal)
24. 24.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
25. 25.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
26. 26.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 320 N bucket on the axle, in newtons? (ideal)
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, ice 4 N, a glass sheet 8 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
28. 28.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a window blind cord (c) a well-bucket rope wheel (d) a knife edge
30. 30.💪 A force is a … (a) push or a pull (b) unit of time (c) type of sound (d) kind of colour
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 11 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
32. 32.🪝 A pulley system lifts a 320 N load with an effort of 160 N. What is its mechanical advantage (MA)?
33. 33.🏋️ A force of 230 N did 460 J of work. How many metres did the object move?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
35. 35.💪 Two children push a box to the right, one with 75 N and the other with 30 N. What is the net (total) force on the box, in newtons?
36. 36.⚖️ A seesaw balances. Arjun (760 N) sits 2 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.⚖️ A lever bar balances. The load is 180 N at 10 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 10 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
39. 39.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) on the pivot (d) farther from the pivot
40. 40.🛞 More or less friction: skating on ice? (a) more friction (b) less friction

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