Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 988 · 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.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
3. 3.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
4. 4.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, ice 2 N, a glass sheet 5 N. How many newtons more were needed on a carpet than on ice?
6. 6.⚖️ A lever bar balances. The load is 560 N at ? cm from the fulcrum. The effort is 280 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, ice 4 N, a wooden plank 8 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
8. 8.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) muscular force (c) gravity (d) friction
9. 9.🪝 A load of 40 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
10. 10.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
11. 11.🛞 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. How many newtons more were needed on sandpaper than on ice?
12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
13. 13.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
14. 14.💪 Which force is at work: shoes grip the floor? (a) gravity (b) magnetic force (c) muscular force (d) friction
15. 15.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
16. 16.🔍 Which is the odd one out? (a) a wood screw (b) a jar lid (c) a screw jack (d) a round doorknob
17. 17.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
18. 18.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
19. 19.True or false: a tyre with deep treads gives less friction. (a) False (b) True
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a wooden plank 7 N, a carpet 8 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
21. 21.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) use a smaller force (d) stop all friction
22. 22.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
24. 24.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
25. 25.True or false: a nut and bolt is a lever. (a) False (b) True
26. 26.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
27. 27.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
28. 28.True or false: a round doorknob is a wheel and axle. (a) True (b) False
29. 29.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
30. 30.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
31. 31.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
32. 32.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
33. 33.True or false: a nutcracker is a wheel and axle. (a) False (b) True
34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
36. 36.True or false: your forearm is a class 1 lever (fulcrum in the middle). (a) True (b) False
37. 37.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
38. 38.💪 A force is a … (a) push or a pull (b) unit of time (c) type of sound (d) kind of colour
39. 39.💪 In a tug of war, one team pulls left with 55 N and the other pulls right with 40 N. What is the size of the net force, in newtons?
40. 40.⚖️ A lever bar balances. The load is 40 N at ? cm from the fulcrum. The effort is 40 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids