Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 205 · 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.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Asha (200 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
4. 4.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
5. 5.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
7. 7.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) colour of bar (d) distance from fulcrum
8. 8.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
9. 9.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
10. 10.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
11. 11.🪝 A load of 680 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
12. 12.💪 Which force is at work: a magnet picks up pins? (a) magnetic force (b) friction (c) muscular force (d) gravity
13. 13.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
14. 14.⚖️ A lever bar balances. The load is 600 N at ? cm from the fulcrum. The effort is 200 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) balanced (d) gravity
16. 16.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
17. 17.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
18. 18.🔍 Which is the odd one out? (a) a playground slide (b) a truck loading ramp (c) a road up a hill (d) a wood screw
19. 19.⚖️ A lever bar balances. The load is 420 N at ? cm from the fulcrum. The effort is 210 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) True (b) False
21. 21.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the pulley (c) the effort (d) the fulcrum
22. 22.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) newton (N) (d) second (s)
23. 23.💪 In a tug of war, one team pulls right with 15 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
24. 24.💪 Which can a force NOT do? (a) change its colour (b) change its shape (c) stop it moving (d) start it moving
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 8 N, ice 1 N, a wooden plank 3 N. How many newtons more were needed on sandpaper than on ice?
26. 26.True or false: a claw hammer on a nail is a screw. (a) False (b) True
27. 27.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 200 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.Which of these is caused by magnetic force? (a) a rolling ball slows (b) squeezing a lemon (c) shoes grip the floor (d) a compass needle turns
29. 29.⚙️ Which simple machine is a claw hammer on a nail? (a) inclined plane (b) pulley (c) lever (d) screw
30. 30.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a seesaw (c) a nutcracker (d) a crowbar
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, sandpaper 12 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 2 N, a wooden plank 3 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
33. 33.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
34. 34.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
35. 35.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
36. 36.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the effort (c) the axle (d) the fulcrum
37. 37.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
38. 38.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
39. 39.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
40. 40.💪 A box weighs 200 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?

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