Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 225 · 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 force of 150 N did 300 J of work. How many metres did the object move?
2. 2.True or false: a movable pulley only changes direction. (a) True (b) False
3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
4. 4.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) a wet tiled floor (d) a tyre with deep treads
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a carpet 10 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on ice?
6. 6.🔍 Which is the odd one out? (a) powder on a carrom board (b) a tyre with deep treads (c) a rough doormat (d) sand on a slippery path
7. 7.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
8. 8.True or false: pulling a cart is a pull. (a) True (b) False
9. 9.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
10. 10.True or false: a tug of war is a pull. (a) False (b) True
11. 11.⚖️ A seesaw balances. Ravi (300 N) sits ? m from the pivot on one side; Arjun (200 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
12. 12.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
13. 13.🪝 A pulley system lifts an 80 N load with an effort of 40 N. What is its mechanical advantage (MA)?
14. 14.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
15. 15.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) a wheel on a rod (d) two ramps back to back
16. 16.💪 Two children push a box to the right, one with 50 N and the other with 90 N. What is the net (total) force on the box, in newtons?
17. 17.⚖️ A lever bar balances. The load is 120 N at 10 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 7 N, sandpaper 10 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
19. 19.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) skating on ice (d) a grippy rubber sole
20. 20.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 10 N, a glass sheet 2 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
22. 22.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
23. 23.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
24. 24.True or false: closing a drawer is a pull. (a) False (b) True
25. 25.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
26. 26.True or false: a bottle opener is a class 2 lever (load in the middle). (a) True (b) False
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 8 N, sandpaper 11 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
28. 28.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
29. 29.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
30. 30.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
31. 31.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
32. 32.💪 A box weighs 550 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
33. 33.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
34. 34.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
35. 35.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
36. 36.💪 A cart is pulled to the right with 80 N and to the left with 80 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
37. 37.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a rough doormat (c) powder on a carrom board (d) skating on ice
38. 38.🪝 A load of 40 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
39. 39.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
40. 40.💪 A bag has a mass of 31 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?

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