Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 449 · 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 class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
2. 2.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) far from the fulcrum (d) on the fulcrum
3. 3.💪 A cart is pulled to the right with 40 N and to the left with 45 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
4. 4.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
5. 5.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
6. 6.🏋️ Pushing a crate 2 m took 820 J of work. What force was used, in newtons?
7. 7.💪 A cart is pulled to the right with 65 N and to the left with 75 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
8. 8.🛞 How can we reduce friction in a machine? (a) press parts harder (b) oil the moving parts (c) add sand (d) make parts rough
9. 9.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) friction (c) magnetic force (d) gravity
10. 10.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
12. 12.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
13. 13.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) friction (d) wind
14. 14.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
15. 15.⚖️ A seesaw balances. Asha (300 N) sits 3 m from the pivot on one side; Meena (450 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
16. 16.⚖️ A seesaw balances. Arjun (360 N) sits 2 m from the pivot on one side; Meena (240 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
18. 18.💪 Two children push a box to the right, one with 85 N and the other with 60 N. What is the net (total) force on the box, in newtons?
19. 19.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 3 (c) class 2
20. 20.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
21. 21.⚖️ A seesaw balances. Ravi (120 N) sits 3 m from the pivot on one side; Arjun (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
22. 22.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
23. 23.True or false: a bottle opener is a screw. (a) True (b) False
24. 24.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
25. 25.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) mass of fulcrum (d) colour of bar
26. 26.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
27. 27.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
28. 28.🔍 Which is the odd one out? (a) a grippy rubber sole (b) powder on a carrom board (c) a rough doormat (d) a tyre with deep treads
29. 29.True or false: closing a drawer is a push. (a) True (b) False
30. 30.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
31. 31.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the fulcrum (d) the effort
32. 32.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
33. 33.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
34. 34.🏋️ A force of 20 N did 60 J of work. How many metres did the object move?
35. 35.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
37. 37.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) sandpaper (d) glass
38. 38.🏋️ Pushing a crate 9 m took 2970 J of work. What force was used, in newtons?
39. 39.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 2 (c) class 1
40. 40.True or false: a fishing rod is a class 2 lever (load in the middle). (a) False (b) True

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