Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 111 · 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.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 3 (c) class 2
2. 2.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) a wet tiled floor (d) chalk on a gym bar
3. 3.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
4. 4.Which of these is caused by magnetic force? (a) pedalling a cycle (b) shoes grip the floor (c) a fridge magnet sticks (d) rain falls to the ground
5. 5.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 1 (c) class 2
6. 6.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) more effort needed (d) no change
7. 7.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the fulcrum (d) the effort
8. 8.🪝 A bucket weighing 360 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
9. 9.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
10. 10.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
11. 11.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
12. 12.Which of these is a lever? (a) a jar lid (b) a seesaw (c) a playground slide (d) a well winch handle
13. 13.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
14. 14.🔍 Which is the odd one out? (a) a bottle opener (b) a nutcracker (c) a crowbar (d) a well winch handle
15. 15.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
16. 16.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 3 (d) 12
17. 17.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 3 (c) class 1
18. 18.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
19. 19.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
20. 20.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
21. 21.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a compass needle turns (c) pedalling a cycle (d) a rolling ball slows
22. 22.💪 Which force is at work: a river flows downhill? (a) friction (b) gravity (c) muscular force (d) magnetic force
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
24. 24.⚖️ A seesaw balances. Asha (380 N) sits 1 m from the pivot on one side; Ravi (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
26. 26.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) sand on a slippery path (d) a smooth steel slide
27. 27.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
28. 28.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
29. 29.⚙️ Which simple machine is a well winch handle? (a) lever (b) wheel and axle (c) inclined plane (d) pulley
30. 30.🪝 A load of 100 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
31. 31.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Ravi (440 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.💪 A box weighs 20 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
33. 33.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) the bar is short (d) turning effects match
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 9 N, a carpet 10 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
35. 35.⚙️ A screw is really … (a) a kind of wheel (b) a ramp wrapped round (c) a bent lever (d) a tiny pulley
36. 36.🪝 A well winch has a handle (wheel) of radius 25 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
37. 37.⚖️ A lever bar balances. The load is 720 N at ? cm from the fulcrum. The effort is 270 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a wooden plank 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
40. 40.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True

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