Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 199 · 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.True or false: pushing a swing is a push. (a) False (b) True
2. 2.⚖️ A seesaw balances. Kabir (130 N) sits 3 m from the pivot on one side; Arjun (390 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a flat ramp (d) a smaller rod (axle)
4. 4.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Kabir (390 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
6. 6.True or false: a movable pulley halves the effort. (a) True (b) False
7. 7.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, a glass sheet 4 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
9. 9.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
10. 10.True or false: hitting a cricket ball is a pull. (a) True (b) False
11. 11.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
12. 12.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a tyre with deep treads (d) powder on a carrom board
13. 13.🪝 A well winch has a handle (wheel) of radius 14 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
15. 15.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
16. 16.🏋️ A force of 420 N did 2520 J of work. How many metres did the object move?
17. 17.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 60 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.🏋️ Pushing a crate 7 m took 1890 J of work. What force was used, in newtons?
19. 19.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
20. 20.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) friction (c) muscular force (d) gravity
21. 21.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
22. 22.🔍 Which is the odd one out? (a) the tip of a nail (b) a door stopper (c) a chisel (d) a wheelchair ramp
23. 23.⚙️ Which simple machine is a jar lid? (a) screw (b) lever (c) pulley (d) inclined plane
24. 24.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wet tiled floor (c) a rough doormat (d) a grippy rubber sole
25. 25.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
26. 26.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
27. 27.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the axle (d) the effort
28. 28.💪 Which force is at work: squeezing a lemon? (a) magnetic force (b) gravity (c) muscular force (d) friction
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 9 N, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
30. 30.True or false: a grippy rubber sole gives more friction. (a) False (b) True
31. 31.⚖️ A seesaw balances. Zoya (450 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?
32. 32.⚖️ 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?
33. 33.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) gravity (d) friction
34. 34.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
35. 35.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) the fulcrum moves (d) both weights are equal
36. 36.True or false: pulling up your socks is a push. (a) False (b) True
37. 37.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) warm (d) cold
38. 38.💪 Which force is at work: a compass needle turns? (a) friction (b) magnetic force (c) muscular force (d) gravity
39. 39.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
40. 40.True or false: sand on a slippery path gives less friction. (a) True (b) False

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