Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 346 · 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 bucket weighing 130 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.💪 A bag has a mass of 34 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
3. 3.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
4. 4.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Zoya (600 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) friction (d) wind
6. 6.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
7. 7.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) two ramps back to back (d) a wheel on a rod
8. 8.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wheel on ball bearings (c) a wet tiled floor (d) a grippy rubber sole
9. 9.💪 A force is a … (a) kind of colour (b) type of sound (c) push or a pull (d) unit of time
10. 10.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
11. 11.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
12. 12.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
13. 13.⚖️ A seesaw balances. Kabir (560 N) sits 4 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) True (b) False
15. 15.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) inclined plane (c) wedge (d) wheel and axle
16. 16.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
17. 17.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 3 (d) 10
19. 19.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a loose rope (d) a flat ramp
20. 20.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
21. 21.⚙️ Which simple machine is a well-bucket rope wheel? (a) wedge (b) pulley (c) screw (d) inclined plane
22. 22.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
23. 23.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a smooth steel slide (c) a wheel on ball bearings (d) a rough doormat
24. 24.⚖️ A lever bar balances. The load is 350 N at 40 cm from the fulcrum. The effort is 280 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.True or false: a crane hook block is a pulley. (a) True (b) False
26. 26.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
27. 27.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the colour of rope (d) the direction of pull
28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
30. 30.True or false: a movable pulley needs effort = load. (a) True (b) False
31. 31.⚖️ A lever bar balances. The load is 360 N at 20 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
32. 32.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
33. 33.⚖️ A lever bar balances. The load is 1000 N at ? cm from the fulcrum. The effort is 300 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.True or false: pushing a trolley is a pull. (a) False (b) True
35. 35.⚖️ A lever bar balances. The load is 200 N at 50 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
37. 37.🪝 A pulley system lifts a 380 N load with an effort of 190 N. What is its mechanical advantage (MA)?
38. 38.⚖️ A seesaw balances. Kabir (170 N) sits 3 m from the pivot on one side; Arjun (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
39. 39.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
40. 40.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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