Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 86 · 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.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
2. 2.🪝 A bucket weighing 200 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
3. 3.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) start it moving (d) change its shape
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 2 (b) class 1 (c) class 3
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
6. 6.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
7. 7.⚖️ A lever bar balances. The load is 150 N at 50 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
8. 8.⚙️ Which simple machine is a claw hammer on a nail? (a) screw (b) inclined plane (c) pulley (d) lever
9. 9.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
10. 10.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 120 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.🔍 Which is the odd one out? (a) an axe blade (b) a knife edge (c) a door stopper (d) a truck loading ramp
12. 12.🪝 A pulley system lifts a 300 N load with an effort of 100 N. What is its mechanical advantage (MA)?
13. 13.💪 Which force is at work: a thrown ball comes down? (a) gravity (b) muscular force (c) magnetic force (d) friction
14. 14.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Asha (220 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.⚖️ A lever bar balances. The load is 240 N at 30 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
16. 16.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 1 (c) class 3
17. 17.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
18. 18.Which of these is a lever? (a) a seesaw (b) a well-bucket rope wheel (c) a window blind cord (d) a knife edge
19. 19.🏋️ 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
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
21. 21.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) far from the fulcrum (d) near the fulcrum
22. 22.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
23. 23.True or false: pushing a swing is a push. (a) True (b) False
24. 24.⚖️ A seesaw balances. Asha (360 N) sits ? m from the pivot on one side; Meena (120 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
25. 25.💪 In a tug of war, one team pulls left with 20 N and the other pulls right with 15 N. What is the size of the net force, in newtons?
26. 26.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
27. 27.💪 In a tug of war, one team pulls left with 95 N and the other pulls right with 25 N. What is the size of the net force, in newtons?
28. 28.🔍 Which is the odd one out? (a) a water tap handle (b) a bottle opener (c) a well winch handle (d) a round doorknob
29. 29.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) pedalling a cycle (c) a rolling ball slows (d) rubbing hands warms them
30. 30.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a flat ramp (d) a loose rope
31. 31.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
32. 32.⚖️ A lever bar balances. The load is 1000 N at 10 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
33. 33.True or false: pressing a doorbell is a pull. (a) True (b) False
34. 34.⚖️ A seesaw balances. Kabir (450 N) sits ? m from the pivot on one side; Ravi (150 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
35. 35.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
36. 36.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3
37. 37.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
39. 39.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
40. 40.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley

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