Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 482 · 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.True or false: a round doorknob is an inclined plane. (a) False (b) True
2. 2.🪝 A load of 580 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
3. 3.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
4. 4.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
5. 5.⚖️ A lever bar balances. The load is 350 N at 50 cm from the fulcrum. The effort is 350 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
6. 6.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) False (b) True
7. 7.True or false: a tyre with deep treads gives more friction. (a) False (b) True
8. 8.True or false: a smooth steel slide gives more friction. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) a box pushed on carpet (d) a smooth steel slide
10. 10.Which of these is caused by friction? (a) a rolling ball slows (b) rain falls to the ground (c) lifting a school bag (d) a compass needle turns
11. 11.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) the axle
12. 12.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
13. 13.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
14. 14.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 1 (c) class 3
15. 15.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
16. 16.True or false: a flagpole rope wheel is a lever. (a) True (b) False
17. 17.True or false: pressing a doorbell is a push. (a) False (b) True
18. 18.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
19. 19.⚙️ 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
20. 20.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
21. 21.⚖️ A lever bar balances. The load is 60 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?
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
23. 23.💪 A box weighs 60 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
24. 24.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 80 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.🪝 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
26. 26.Which of these is a wedge? (a) the tip of a nail (b) a nutcracker (c) a seesaw (d) a wood screw
27. 27.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
28. 28.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.True or false: a pair of tweezers is a class 2 lever (load in the middle). (a) False (b) True
30. 30.⚙️ Which simple machine is a steering wheel? (a) screw (b) inclined plane (c) wheel and axle (d) wedge
31. 31.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
32. 32.True or false: pulling up your socks is a push. (a) True (b) False
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
34. 34.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
35. 35.💪 A box weighs 580 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
37. 37.True or false: a crowbar is a class 2 lever (load in the middle). (a) True (b) False
38. 38.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
39. 39.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) muscular force (c) friction (d) gravity
40. 40.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) magnetic force (c) gravity (d) friction

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