Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 943 · 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 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
2. 2.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) stop all friction (d) switch off gravity
3. 3.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.🪝 A bucket weighing 240 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) a rough doormat (d) a box pushed on carpet
6. 6.True or false: a chisel is a pulley. (a) False (b) True
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
8. 8.⚙️ Which simple machine is a wheelchair ramp? (a) lever (b) screw (c) inclined plane (d) wheel and axle
9. 9.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) True (b) False
10. 10.⚖️ A seesaw balances. Ravi (160 N) sits ? m from the pivot on one side; Zoya (160 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
11. 11.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) False (b) True
12. 12.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
13. 13.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
14. 14.True or false: kicking a football is a push. (a) False (b) True
15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
16. 16.True or false: a smooth steel slide gives less friction. (a) False (b) True
17. 17.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
18. 18.⚖️ A seesaw balances. Meena (330 N) sits 1 m from the pivot on one side; Kabir (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
19. 19.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a rough doormat (c) a wheel on ball bearings (d) sand on a slippery path
20. 20.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the fulcrum moves (d) the bar is short
21. 21.🪝 A load of 440 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
22. 22.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.⚖️ A lever bar balances. The load is 200 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.⚖️ A lever bar balances. The load is 80 N at 30 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?
25. 25.True or false: powder on a carrom board gives more friction. (a) True (b) False
26. 26.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
27. 27.🔍 Which is the odd one out? (a) a bottle opener (b) a crowbar (c) a jar lid (d) a seesaw
28. 28.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
29. 29.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
30. 30.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 6 N, a glass sheet 1 N, a wooden plank 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
32. 32.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) powder on a carrom board (d) a wet tiled floor
33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
34. 34.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
35. 35.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
36. 36.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
37. 37.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) friction (c) muscular force (d) magnetic force
38. 38.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 2 (c) class 3
39. 39.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
40. 40.⚖️ A lever bar balances. The load is 500 N at ? cm from the fulcrum. The effort is 500 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?

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