Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 326 · 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 simple machine is a bottle opener? (a) wheel and axle (b) wedge (c) inclined plane (d) lever
2. 2.True or false: drawing up a well bucket is a pull. (a) False (b) True
3. 3.⚙️ Which simple machine is a bottle cap? (a) wedge (b) inclined plane (c) screw (d) wheel and axle
4. 4.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 30 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
5. 5.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
6. 6.True or false: a box pushed on carpet gives more friction. (a) False (b) True
7. 7.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
8. 8.⚖️ A lever bar balances. The load is 630 N at 30 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?
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
10. 10.True or false: a movable pulley needs effort = load. (a) False (b) True
11. 11.💪 A cart is pulled to the right with 55 N and to the left with 55 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
12. 12.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
13. 13.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) gravity (c) friction (d) magnetic force
14. 14.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 7 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
16. 16.🪝 A load of 180 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
17. 17.⚖️ A seesaw balances. Asha (400 N) sits ? m from the pivot on one side; Zoya (400 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
18. 18.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) magnetism (d) gravity
19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
20. 20.True or false: a movable pulley halves the effort. (a) False (b) True
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
22. 22.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) colour of bar (d) time taken
23. 23.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) both weights are equal (d) the bar is short
24. 24.🔍 Which is the odd one out? (a) an axe blade (b) a water tap handle (c) a steering wheel (d) a round doorknob
25. 25.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
26. 26.🏋️ Pushing a crate 6 m took 1440 J of work. What force was used, in newtons?
27. 27.🔍 Which is the odd one out? (a) a rough doormat (b) a tyre with deep treads (c) skating on ice (d) chalk on a gym bar
28. 28.🪝 A winch has a wheel of radius 25 cm and an axle of radius 5 cm. What effort on the wheel lifts a 950 N bucket on the axle, in newtons? (ideal)
29. 29.🪝 A bucket weighing 270 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
31. 31.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 180 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.True or false: a movable pulley is on a flagpole top. (a) True (b) False
33. 33.True or false: hitting a cricket ball is a pull. (a) True (b) False
34. 34.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
35. 35.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 80 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
37. 37.🔍 Which is the odd one out? (a) a tyre with deep treads (b) chalk on a gym bar (c) a box pushed on carpet (d) a wet tiled floor
38. 38.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
39. 39.💪 Which force is at work: a river flows downhill? (a) muscular force (b) gravity (c) friction (d) magnetic force
40. 40.Which of these is a pulley? (a) a window blind cord (b) a knife edge (c) a road up a hill (d) a wheelchair ramp

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