Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 661 · 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.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
2. 2.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
3. 3.True or false: a claw hammer on a nail is a wheel and axle. (a) False (b) True
4. 4.⚙️ A wedge is … (a) two ramps back to back (b) a bar on a pivot (c) a rope on a wheel (d) a wheel on a rod
5. 5.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
6. 6.True or false: a wet tiled floor gives more friction. (a) False (b) True
7. 7.⚖️ 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 3 (c) class 1
8. 8.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wet tiled floor (c) a wheel on ball bearings (d) skating on ice
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 5 N, a carpet 9 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
11. 11.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) magnetism (d) wind
12. 12.⚖️ A seesaw balances. Meena (280 N) sits ? m from the pivot on one side; Arjun (420 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
13. 13.⚖️ A seesaw balances. Ravi (240 N) sits ? m from the pivot on one side; Arjun (360 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
14. 14.💪 A box weighs 200 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
15. 15.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
16. 16.Which of these is caused by friction? (a) squeezing a lemon (b) lifting a school bag (c) shoes grip the floor (d) an apple falls down
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 2 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
18. 18.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) gravity (d) the colour of rope
19. 19.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
20. 20.True or false: a fixed pulley rises with the load. (a) True (b) False
21. 21.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) the fulcrum moves (d) turning effects match
22. 22.Which of these is a lever? (a) a well-bucket rope wheel (b) a wood screw (c) a claw hammer on a nail (d) a screw jack
23. 23.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 10 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, sandpaper 8 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
26. 26.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
27. 27.⚖️ A seesaw balances. Asha (260 N) sits ? m from the pivot on one side; Ravi (520 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
28. 28.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.⚙️ Which simple machine is a crane hook block? (a) pulley (b) inclined plane (c) lever (d) wheel and axle
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a carpet 6 N, sandpaper 7 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
31. 31.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 3 (c) class 2
32. 32.⚖️ A lever bar balances. The load is 270 N at 50 cm from the fulcrum. The effort is 450 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
33. 33.True or false: a fixed pulley halves the effort. (a) True (b) False
34. 34.🪝 A load of 630 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
35. 35.True or false: a wheelbarrow is a class 3 lever (effort in the middle). (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) a crane hook block (b) a round doorknob (c) a window blind cord (d) a well-bucket rope wheel
37. 37.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
38. 38.True or false: a movable pulley needs effort = load. (a) False (b) True
39. 39.⚖️ A seesaw balances. Asha (380 N) sits 2 m from the pivot on one side; Ravi (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?

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