Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 652 · 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 machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
2. 2.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
3. 3.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
4. 4.⚖️ A lever bar balances. The load is 900 N at ? cm from the fulcrum. The effort is 500 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.True or false: the tip of a nail is a wheel and axle. (a) False (b) True
6. 6.Which of these is caused by muscular force? (a) a river flows downhill (b) pedalling a cycle (c) a compass needle turns (d) an apple falls down
7. 7.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) anywhere (d) closer to the pivot
8. 8.⚙️ Which simple machine is a bottle opener? (a) wedge (b) pulley (c) lever (d) wheel and axle
9. 9.🪝 A load of 380 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
10. 10.⚙️ Which simple machine is a knife edge? (a) lever (b) wheel and axle (c) inclined plane (d) wedge
11. 11.⚖️ 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?
12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🔍 Which is the odd one out? (a) a window blind cord (b) a wheelchair ramp (c) a truck loading ramp (d) a road up a hill
14. 14.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) use a smaller force (c) switch off gravity (d) stop all friction
15. 15.🔍 Which is the odd one out? (a) a rough doormat (b) oil on a squeaky hinge (c) sand on a slippery path (d) a grippy rubber sole
16. 16.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) near the fulcrum (c) on the rock (d) on the fulcrum
17. 17.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
18. 18.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
19. 19.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
20. 20.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) colour of bar (d) time taken
21. 21.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) chalk on a gym bar (d) skating on ice
22. 22.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
23. 23.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
24. 24.⚙️ A wedge is … (a) a bar on a pivot (b) two ramps back to back (c) a wheel on a rod (d) a rope on a wheel
25. 25.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
26. 26.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) muscular force (c) gravity (d) friction
27. 27.⚙️ Which simple machine is the tip of a nail? (a) screw (b) pulley (c) lever (d) wedge
28. 28.⚖️ A seesaw balances. Kabir (140 N) sits 4 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.⚙️ Which simple machine is a jar lid? (a) inclined plane (b) wedge (c) screw (d) pulley
30. 30.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
31. 31.🪝 A well winch has a handle (wheel) of radius 28 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
33. 33.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
34. 34.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
35. 35.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
36. 36.🪝 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)
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 7 N, a carpet 10 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
38. 38.💪 Which force is at work: a river flows downhill? (a) muscular force (b) friction (c) gravity (d) magnetic force
39. 39.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
40. 40.True or false: a tug of war is a push. (a) False (b) True

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