Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 813 · 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.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
2. 2.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a grippy rubber sole (d) oil on a squeaky hinge
3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
4. 4.Which of these is a wedge? (a) a water tap handle (b) a jar lid (c) an axe blade (d) a playground slide
5. 5.🪝 A load of 400 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
6. 6.🔍 Which is the odd one out? (a) a chisel (b) a well-bucket rope wheel (c) a window blind cord (d) a crane hook block
7. 7.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
8. 8.🔍 Which is the odd one out? (a) a chisel (b) a crowbar (c) a knife edge (d) the tip of a nail
9. 9.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) turning effects match (d) the fulcrum moves
10. 10.🪝 A load of 100 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
11. 11.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
12. 12.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
13. 13.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
14. 14.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) False (b) True
15. 15.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) make parts rough (d) press parts harder
16. 16.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
17. 17.True or false: a smooth steel slide gives less friction. (a) False (b) True
18. 18.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
19. 19.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 60 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
21. 21.True or false: pushing a trolley is a pull. (a) False (b) True
22. 22.Which of these is caused by gravity? (a) squeezing a lemon (b) a rolling ball slows (c) an apple falls down (d) brakes stop a bicycle
23. 23.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the effort (c) the load (d) nothing
24. 24.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
25. 25.🔍 Which is the odd one out? (a) a water tap handle (b) a claw hammer on a nail (c) a crowbar (d) a bottle opener
26. 26.True or false: closing a drawer is a push. (a) True (b) False
27. 27.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
28. 28.True or false: a rough doormat gives less friction. (a) True (b) False
29. 29.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) friction (c) magnetic force (d) gravity
30. 30.⚖️ A seesaw balances. Kabir (170 N) sits 3 m from the pivot on one side; Zoya (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
32. 32.True or false: a fixed pulley halves the effort. (a) True (b) False
33. 33.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a glass sheet 4 N, a carpet 7 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
35. 35.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
36. 36.True or false: a smooth steel slide gives more friction. (a) False (b) True
37. 37.💪 A bag has a mass of 24 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
38. 38.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
39. 39.True or false: a fixed pulley rises with the load. (a) True (b) False
40. 40.True or false: a wheelchair ramp is an inclined plane. (a) False (b) True

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