Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 110 · 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 600 N when you push with 150 N. What is its mechanical advantage (MA)?
2. 2.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
3. 3.True or false: a tyre with deep treads gives less friction. (a) False (b) True
4. 4.⚖️ A lever bar balances. The load is 200 N at 20 cm from the fulcrum. The effort is 40 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
6. 6.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
7. 7.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
8. 8.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
9. 9.⚖️ A lever bar balances. The load is 20 N at ? cm from the fulcrum. The effort is 30 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
10. 10.💪 Which force pulls everything towards the Earth? (a) magnetism (b) wind (c) gravity (d) friction
11. 11.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
12. 12.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) turning effects match (d) both weights are equal
13. 13.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) stop all friction (d) use a smaller force
14. 14.⚖️ A seesaw balances. Zoya (130 N) sits ? m from the pivot on one side; Asha (520 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
15. 15.True or false: a smooth steel slide gives less friction. (a) False (b) True
16. 16.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
17. 17.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Meena (360 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.True or false: drawing up a well bucket is a pull. (a) False (b) True
19. 19.Which of these is an inclined plane? (a) a truck loading ramp (b) a seesaw (c) a water tap handle (d) a screw jack
20. 20.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 1 (c) class 2
21. 21.⚙️ Which simple machine is a chisel? (a) inclined plane (b) wedge (c) pulley (d) screw
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
23. 23.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a truck loading ramp (b) a wheelchair ramp (c) a bottle opener (d) a playground slide
25. 25.🪝 A pulley system lifts a 570 N load with an effort of 190 N. What is its mechanical advantage (MA)?
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 100 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
27. 27.⚙️ 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
28. 28.True or false: a chisel is a screw. (a) True (b) False
29. 29.True or false: a chisel is a wedge. (a) True (b) False
30. 30.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a loose rope (d) a sharp wedge
31. 31.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) less effort needed (d) the load floats
32. 32.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 3 (c) 12 (d) 10
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 6 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
34. 34.💪 Which force is at work: a river flows downhill? (a) muscular force (b) magnetic force (c) gravity (d) friction
35. 35.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) muscular force (c) friction (d) gravity
36. 36.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
37. 37.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the fulcrum (c) far from the fulcrum (d) on the rock
38. 38.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
39. 39.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
40. 40.True or false: a pair of scissors is a class 2 lever (load in the middle). (a) False (b) True

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