Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 130 · 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 wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a sharp wedge (d) a smaller rod (axle)
2. 2.Which of these is a lever? (a) a chisel (b) a bottle opener (c) a door stopper (d) a crane hook block
3. 3.⚖️ A lever bar balances. The load is 800 N at ? cm from the fulcrum. The effort is 300 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
4. 4.⚙️ 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
5. 5.⚙️ Which simple machine is a flagpole rope wheel? (a) wedge (b) lever (c) pulley (d) inclined plane
6. 6.True or false: opening a drawer is a pull. (a) False (b) True
7. 7.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) press parts harder (c) add sand (d) make parts rough
8. 8.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
9. 9.💪 A box weighs 510 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
10. 10.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 240 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
12. 12.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
13. 13.💪 Which can a force NOT do? (a) change its shape (b) change its colour (c) stop it moving (d) start it moving
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 0 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
15. 15.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
16. 16.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to look nice (d) to grip the road
17. 17.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 550 N bucket on the axle, in newtons? (ideal)
18. 18.🔍 Which is the odd one out? (a) a road up a hill (b) a seesaw (c) a bottle opener (d) a nutcracker
19. 19.⚖️ A lever bar balances. The load is 180 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
21. 21.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
23. 23.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
24. 24.True or false: a nutcracker is a class 2 lever (load in the middle). (a) True (b) False
25. 25.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
26. 26.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
28. 28.Which of these is caused by magnetic force? (a) a rolling ball slows (b) a magnet picks up pins (c) an apple falls down (d) squeezing a lemon
29. 29.⚙️ Which simple machine is a nutcracker? (a) pulley (b) wedge (c) wheel and axle (d) lever
30. 30.⚖️ A lever bar balances. The load is 400 N at ? cm from the fulcrum. The effort is 80 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) nothing (c) the fulcrum (d) the load
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 7 N, sandpaper 8 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
33. 33.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
34. 34.True or false: a movable pulley is on a flagpole top. (a) True (b) False
35. 35.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) gravity (c) friction (d) magnetic force
36. 36.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
37. 37.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
38. 38.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
39. 39.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a screw jack (c) a bottle cap (d) a nut and bolt
40. 40.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)

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