Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 838 · 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a carpet 7 N, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
3. 3.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.True or false: pushing a trolley is a pull. (a) False (b) True
5. 5.⚖️ A seesaw balances. Kabir (400 N) sits 4 m from the pivot on one side; Asha (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
6. 6.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) chalk on a gym bar (d) a wet tiled floor
7. 7.💪 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?
8. 8.💪 Which force is at work: brakes stop a bicycle? (a) friction (b) magnetic force (c) gravity (d) muscular force
9. 9.⚙️ Which simple machine is a well-bucket rope wheel? (a) wedge (b) pulley (c) lever (d) screw
10. 10.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
11. 11.True or false: kicking a football is a pull. (a) True (b) False
12. 12.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to save rubber (d) to go slower
13. 13.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) less effort needed (d) no change
14. 14.🔍 Which is the odd one out? (a) a well winch handle (b) a bottle opener (c) a nutcracker (d) a crowbar
15. 15.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
17. 17.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) a jar lid (b) a screw jack (c) a truck loading ramp (d) a bottle cap
19. 19.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
20. 20.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
21. 21.⚙️ Which simple machine is a seesaw? (a) inclined plane (b) lever (c) pulley (d) wedge
22. 22.⚖️ A lever bar balances. The load is 180 N at 30 cm from the fulcrum. The effort is 270 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.⚖️ A lever bar balances. The load is 320 N at ? cm from the fulcrum. The effort is 400 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.🪝 A winch has a wheel of radius 6 cm and an axle of radius 1 cm. What effort on the wheel lifts a 480 N bucket on the axle, in newtons? (ideal)
25. 25.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) far from the fulcrum (d) on the fulcrum
26. 26.⚙️ Which simple machine is a claw hammer on a nail? (a) screw (b) lever (c) wedge (d) pulley
27. 27.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a loose rope (c) a flat ramp (d) a sharp wedge
28. 28.🛞 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 9 N, a carpet 13 N. How many newtons more were needed on a carpet than on ice?
29. 29.True or false: chalk on a gym bar gives more friction. (a) False (b) True
30. 30.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 3 (c) class 2
31. 31.Which of these is a wedge? (a) a water tap handle (b) a door stopper (c) a crowbar (d) a crane hook block
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 50 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
34. 34.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 10 (d) 3
35. 35.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
36. 36.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Zoya (480 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
38. 38.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
39. 39.⚖️ A lever bar balances. The load is 360 N at 20 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3

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